Not sure exactly what to flair this but I really need some advice! 

In my day to day life I've managed to get myself to a point where my BPD barely affects me anymore, but FPs are my biggest weakness. I've been single for some time now, but I've been just casually dating around for a few months and it's been fun! I hadn't had any strong attachments to any of the guys I'd been seeing and I'd been very good with just doing my own thing, not caring much about if I'll end up in a relationship or not and just living a pretty stable life overall.

However, one of the guys I met I've become absolutely smitten with, I didn't get any FP feelings with him for the first few months and I just genuinely really liked his company and wanted to see where things could go, but now we've gotten to a point where a relationship seems highly likely, all of that obsessiveness I thought was gone has suddenly hit me like a truck. 

We both like each other a lot and I don't want to feel this crushing obsession for him but I'm already noticing that I'm splitting him in my head if he takes longer than usual to respond and I can't focus on anything but him. I have Uni assignments due all next week and I've just been sat here staring off into space thinking about him instead of working!!

I thought to myself, okay I'll take a break from trying to work and do something I enjoy instead, but even then I'll end up daydreaming about him and wishing I could be spending time with him instead of doing literally anything else. He's consuming my every thought and it's honestly so frustrating! I don't want to throw away my entire life and personality for another person again but I have no clue how to stop it :(

Any coping strategies or advice that could help my situation a little? I want my life back lol :')