Need some advice on a mate of mine

ok, ok. so. heres the deal.(with a TLDR at the bottom)

last year(early 2025 to be specific) I made an online friend through Team fortress 2. let's call him "bill". now, bill is, unsurprisingly, quite a bit neurodivergent. I don't mean that in a negative way or postitive way, moreso in that I think he may be undiagonosed given that he 1. has 2 very strong hyperfixations that he likes to bring up even if the topic isn't at hand(star wars and the other one we'll get to) 2. gets overstimulated easily(I'm actually on the lower end of the spectrum myself, so I don't exactly get oversimulated as easily(plus its combined with adhd so that has a factor too)), 3. is very dead-set on his opinions and 4. has a weird need to "save" people
he also has OCD. he told me himself. now, the reason I bring up all this is cause it helps in shaping the situation at hand.

so, bill and I start out pretty good friends. we talk, we play, have a good time, the whole bolts and screws. for a while, it was normal. but then, bill's other hyperfixation slowly makes itself present overtime: Christanity. yes really. specifically fundamental christanity.

it slowly eases its way into our conversations via philosophical questions. I myself am not religious, since I chose to believe in me(not in a god complex way, in a "the only person who can do something and control something about me and my life, is me" way) and since I do like me a good philosophical topic, I indulge him a few times. arguably this comes to bite me in the patoot later but I digress.

now, I actually made bill a drawing, back when we were solid friends. he loved it, and since we met through TF2, he said he was gonna pay me back in MVM tickets. 2 full tours worth, once the update had come out. a relatively good deal that we had agreed on. (one of the few things we actually did, funnily enough)

however, overtime with these philosophical questions, he starts bringing up christianity a fair bit. he first breached the question over a cosmetic that had a cross in it, "you a christian btw?" being his exact words. I obviously said no, especially since I was trying to give said cosmetic away. which, you think would make him end that idea there, right?

oh, mate, you couldn't be further from the truth.

it began going downhill, starting with a nightmare he had, where apparently he saw himself not being saved in the rapture. which caused him to drop video games and also, strangely enough, "dark jokes" as he called them (that weren't usually extreme and were usually just silly) as they were "too violent" and "not something that could help me get into heaven" (yet not star wars.... a franchise with hella violence and supposably dark themes(according to him) in it. go figure I guess)

because of this dream, overtime, his religion became all bill wanted to talk about. all he wanted to tell me. now, I get that he's quite young and its very fun to ramble about something you love dearly, but there are definitely limits to these things. I mean, he never asked me about the stuff I liked, aside from TF2. he didn't even know what kinda movies I like. or anything, for that matter. (that and he's weirdly opposed to any music outside of classical? not too sure whats up with that)

needless to say, it caused our friendship to kinda collaspe. I was relatively saddened by it, as it was clear to me that his religion combined with his OCD seemed to be causing him to think his life was over before it began, but glad that it happened as it strengthened a bond between another, actual friend of mine and me. (who I'm still solid with, and who is definitely a top tier friend of mine)

cut to this year, 2026, around april-ish. he messages me, kinda akwkardly, saying that hes sorry and whatnot. which, I do forgive... somewhat. obviously Im cautious of him, since I did realise in hindsight his behaviour was very pushy and not very respectful to me (especially since alot of his texts- looking back- read like he was trying to convert me). but I do try to be the bigger person and try to get back onto his good side. especially since he tends to find himself alone quite fast. he's just that sorta person, if that makes sense. I suppose I pity him in some way because of that.

but see, the thing is, I really want to drop him. like, bad. I know it's a jerk move of me. but, in my postition, can ya blame me? hes going through his own dramas, his own arcs of life and frankly, while I have helped him realise a few things in alotta ways (especially the neurodivergent stuff), I know that I shouldn't be someone to fall back on, so to speak. that and he knows my views don't align with his. however, he owes me those tickets still. and that update hasn't come out yet. I have no doubt in my mind it'll be anytime soon, since it's Valve(tm) and Valve tends to take a good while, and I am getting wary of him.

so, what I'm asking is this: is there any way I can maybe remind him of it? or like, maybe get those tickets early? he is generally a nice guy and all, don't get me wrong(despite the image I painted of him), but I think it's only the version of past me that he likes in his head thats keeping him around. I don't wanna play with him when the update happens, either, so the faster he can get out of my hair, the better.

TLDR: mates kind of a person that I don't wanna hang around with anymore, need help figuring out how to get what he owes me out of him so I can drop the bloke clean

Thanks in advance y'all