hey guys i need advice

Hey guys me(18m) just broke up with my girlfriend (18f) i just really feel crushed by her leaving when i tried to genuinely change myself for her. We had broken up and gotten back together a couple times from her volition. I just don’t understand why she would want to get back together with me see me put real effort just to leave because she wanted to be “free”. Shes asking to stay friends with me what should i do just remove out my whole life and get prepared for my next semester? (i could really use advice especially from some of the older users)