I want to get over someone and it honestly seems impossible

I broke up with someone not too long ago and it wasn't even that big of a deal I feel. We dated for three weeks and we hadn't even kissed and he just one day sent me a text saying that we shouldn't talk for a while because something that happened in his personal life(I do not know what happened, he never told me) and he just ignored me the whole time. We had a few of the same classes together in college so that's how we ended up talking and I guess started to like each other and one he asked me out. And after three weeks he did this. For a whole week he pretended that I didn't even exist. He wouldn't even look in my general direction if he didn't have to and it honestly just broke me. And then after that week, he asked his friend to call me outside to talk to me. And things happened and we ended up ending things on the phone and he wouldn't even tell me the reason why he wanted to end things. I asked him about three times on the call and he told me its a personal reason, how can I just tell you that? For whatever reason that was I guess I'm fine with it. I'm not entirely sure. But I think I'm fine with it. But what is bugging me even more is that he asked me if we could stay friends. And the reason he asked me that was because if he saw me around he wouldn't be able to stop himself from saying hi. But now he just actually pretends like i don't exist. He talks to my friends and everyone else just the same though. I don't even know why I'm so hung up on him. Sure I liked him for a long time but is that the only reason why I'm so hung up on him? I haven't cried either after we ended things. Sometimes I feel like all I need to do is just cry and I will just automatically move on. I know that this is process is not easy and that it takes a lot of time but sometimes I just feel like I just want to be okay with myself. And the thing is I don't know if I should even feel this way because the actual amount of time we spent together doesn't even feel that significant. I don't think I like him as much anymore or I think I'm pretty sure I don't like him anymore but I can't seem to move on. I just want my old cycle back where my life was on track. If you have any advice it would be greatly appreciated.

To be honest I think you had a very lucky escape, three weeks in with these red flags. Count yourself lucky. Imagine if this is his behavior in three weeks imagine what it would be like in three months three years so on... You need to buckle up and get your thinking cap on, he sees your in desperate need of his attention, if he doesn't look your way you feel like crying... Okay stop what you were doing!!! Start changing by surrounding yourself with friends let him see your laughing and enjoying your days, see any cute boys (DON'T BE OBVIOUS) Start being more social, chat to everyone but him. Let him see he is not your everyday thought. Keep this up!!! What you're doing is what he's been doing to you. He knows he'll have you by a click of his fingers. When he does just tell him sorry you're busy or you've got a lot of problems to deal with right now, if he asks sorry it's personal. You got to keep strong and most of all be intelligent.. If you keep up letting him treat you like this, he's gonna be letting his mates know, hey watch this click click and there you are... You're more than this, you deserve better, never doubt your worth, I believe in you so believe in yourself!! Keep us updated and goodluck ☘️