Replying to WHAT THE FUCK DO I DO!!!

so ive liked this girl for over 3 years, i talked to her a little bit but about two months ago i started talking to her a lot. We talk every day and she figured out i like her. I knew she liked someone else but I didnt really care yet. When she finally realised the guy she like was an asshole i thought i might get lucky and she might want to date me. Me and my friend took her to the mall and hung out with her and stuff and now she told me i have no chance and it turns out she likes him.. To add this all together, i found all this out today and its my birthday. wat should i do?