People here tell you that u are so young, you have so many things in your future, just move on, you will laugh about this, etc etc. Yes they are right, but what everybody forgets when you get older, that the stupid things that you laught at when you look back are your biggest problems at that time. I think that the "weight" of a problem is always totally subjective and dependant on your current situation. At the age of 4 your bigest problem is that someone bited you in kindergarten. It hurts just the same as you lose your job or or to get fucked by life when you are adult.

So, at the moment your bigest problem is that you broke up with your girlfriend and now she wanna be together again, and in the meantime you fucked a hooker.

I think that the hooker thing will fade away quickly, you feel bad about it rn but mainly because of your ex. Yes u regretted it, you leart your lesson, you will move on with a bit of time. Losing somebody on the otherhand is a big deal. Breaking up with somebody especially if it was a serious thing has the same effect as mourning but obviously not as serious. These things need time. A big plot twist os that she wanna be back together. Well, only you guys can actually decide if it is a good idea, it is a double edged sword. If you can fix the things that led tou your breakup than maybe this can turn out well. On the other hand, if you had major disagreements, maybe you feel like you will be able to fix it but it probably won't happen and you will be in the same boat. Only you can decide tho. Talking about it deffinetely helps.

Don't feel ashamed of the hooker, everybody makes mistakes, especially when you have to suddenly grow up in your age, when you relize you are not a kid anymore, you make some messed up decisions, but these things are actually the ones that make you grow up.