I tended to get crushes a lot throughout college, so I have, well, a lot of data points, at least
I did have a significant amount of crushes on guys I didn’t really know, that were fairly hormonal, I guess. I had a smaller number of more intense crushes on guys who I knew better. I usually found that although I could still get quite intense emotions and feelings, if it was someone I didn’t know so well, the feelings at least would tend not to last as much.
There can definitely be a bit of an idealization thing that happens… like, when it was someone who I did get to know a little, I’d start feeling like everything I’d like about him meant this was perfect and the one. But that was really just the crush speaking. One generally would need to get to know someone more closely to really have a better idea about compatibility and so forth. I do, however, know that just hearing that “there will be other chances, and don’t invest too much in someone you only know a little bit” doesn’t necessarily change the core emotions… it mostly just changes the way I would think about it. It can be pretty hard to really influence the feelings themselves.
As far as forgetting, I generally found that really the best solution was time. I know it would be nice to be able to hear a quick easy fix (I’d certainly wished for those plenty of times) but if you just think of it this way… if you give it the chance, time can soothe these feelings and you’ll be able to look at them more calmly again. It may be difficult now but you can get through it, and gain a closer understanding of your own emotions on the other end.
Where it comes to positives, I do think that a crush, regardless of whether it leads anywhere, can provide benefits as well. You are a writer, and anything that you feel gives you material to draw on for inspiration, to express feelings in words, to draw on emotions that can pour out in your work, reflected in whatever manner best suits your work. Feeling powerful emotions is also a learning experience about yourself, and people in general, for you can become better in tune with your own feelings, and with experiences common to many people. It can give an understanding that will deepen your creative work, raw material for expressing yourself and for relating to and connecting with other people.
As far as advice, I’ll just say, do take care of yourself see what your emotional needs are, because you don’t need to put yourself in situations that might cause more distress. Go with what makes you feel comfortable! And I wish you best of luck with everything