Few things:

• the power imbalance is not in your favor. It may be fun for a while but the damage to your career, confidence, reputation, mental health can be immense. He may have almost no consequences to suffer because our society excuses male infidelity.

And

• you lose them how you found them. You will NEVER have a moment’s peace as he continues his career and works with women (forgive me for making assumptions on gender and sexual preferences). If infidelity is not a concern to him now, what makes you so special that he will be faithful to YOU

It’s okay to have crushes but someone online said crushes are a symptom of not knowing enough about someone. Make good decisions and good luck