Is it bad to not really care about your best friends' love lives?

So I have these two friends (friend a is a bi guy and friend b is a straight girl) that I have known for a long time,  friend b has been in a lot of relationships that would last a couple of weeks to a couple of months ever since like forever. Meanwhile friend A used to talk to a lot of guys within the span of the entire fall semester(not at the same time) in our junior year. I used to always hear them out on their relationship stuff and boy trouble that they would have and for the most part I didn't mind, but it got to a point where I would almost always hear it all the time and it was annoying as hell. Especially with friend A because it felt like a speed run even though I knew that it wasn't intentional, but it felt like he didnt give himself time to heal and work on himself before talking to another dude, I had to talk to him about it because I didn't want him to get so worked up about trying to find a man and he agreed. Friend B however doesn't really take my advice, respectfully, she's somewhat of a dumbass and its disappointing because she's a smart girl and I try my best to look out for her but I'm aware that some of the stuff that happens to her isn't in her control so I don't get mad at that.

 Fortunately though since senior year has started that friend B is in a healthy relationship and friend A is currently talking to A guy that seems a bit promising, even though I'm happy for them, I just can't really bring myself to care about their boy stuff as much as I used to and I feel bad because I like to talk about it and give them my opinions and advice. But with how most of their relationships turned out and how friend b dealt with some of them, I just dont have any high hopes for their current/future relationships. It sucks because it feels like I'm hating on them because I'm the only single friend in our trio and they're not so therefore im jealous that they got someone and I don't even though I know my feelings aren't coming from a place of hatred and jealousy.

I hope I'm not the asshole for this but I understand if this does comes off as that, I just don't have anyone to express my thoughts about this and it's been eating me alive. I'm sorry if this blog seems a bit rambly, I try to be direct about this and not draw it out too long when it came to the background info.