the boy i got a crush on

guys, HELP

i can't stop thinking about a boy i like, but it got me stressing cuz i think he doesn't like me anymore (we were almost a couple). i want to start to talk to him again and start again all this BUT what if he already forget me and he's probably liking another girl or something or tanking to her, aahhhh i don't know. 

a few days ago we met after 3 months and half (in a train station btw) and he was not able to stop looking at me (my friend told me, i wasn't looking at him obv). Soooooo, that makes me wonder what was he thinking about when he saw me after so much time, but i cannot know that TT... he still have a crush on me? he still have interest in me?

ii admit: he fell first but i fell harder...

i don't want to feel like this anymore, it's horrible to think that there is a guy out there who u like and u don't know if he does it to... and the fact that i can't take him out of my mind drives me crazy...

what do u guys suggest?