Went on a date and miss my ex

We were together for 3.5 years - we broke up because it was my fault, I wasn’t building a life for myself l was stuoid and relied on her for my happiness. It’s been two months my friends forced me to go on a dating app and meet someone - went for a walk in Central Park with this new person but now going home and I cannot stop crying I would do anything to have her back I don’t want anyone new FUVK I’m so fucked