missing my ex 😣

I’ve known my ex since high school (we are now sophomores in college)...last semester we were reunited due to school..neither of us really talked to anyone else so we sort of gravitated towards one another..we started spending so much time together and she expressed to me that her feelings for me were getting stronger and honestly, so were mine..we ended up dating and honestly I thought it was the best relationship I’ve ever been in..we started having problems near the end of this summer due to distance (she had to stay back where our school is due to sports, while I was home) and communication..things that seemed important and upset me seemed pointless to her to her which usually started the arguments..after pouring my heart out to her about how much I loved her and wanted the relationship to work 3 days after us not speaking, she said the complete opposite. Today, we’ve been broken up for 2 months now and I still love her as much I did in the relationship..I think she’s moved on and I want to do the same, I really do but something is holding me back..any advice?