I need advice

I need some advice. Back story is I was with my ex girlfriend for 2 years. We broke up because of misunderstanding with each other. She wanted me to go to the gym with her and lose weight and be focus with health. I was immature about it and thought she was forcing me to change and couldn’t see I just didn’t have the time to go to the gym but I tried occasionally. At the time I was working full time 8am-5am and then full time school 6pm -10pm and give and take 1-2 hrs for transportation in nyc. Reality was she didn’t want anyone to make fun of me for my weight so she wanted it for my best interest. We broke up and stayed friend. But 4 months after we broke up she started talking to someone and ended up dating him. I couldn’t stand seeing her with someone because I genuinely loved her but reality is she has every right to move on. At the time I was furious like she moved on so fast etc we both said stuff we shouldn’t have and went ghost with each other. So fast forward 3 years later and tbh I never lost feelings for her I still love her but now I understand you can’t force someone to love you back.
Yesterday she randomly called from a private number I picked up and immediately realized it’s her. We ended up talking for like 2 hours and we apologized to each other for the mistakes we made. I then asked her if she is still with the same guy and she said off and on but she hasn’t been comfortable with anyone but me. I tell her straight up that I still have feelings for her and that she will always be my priority. She sounded like she was going back and forth remembering when we together etc. I don’t know what to do tbh, I don’t wanna keep my expectations high for disappointment but I also don’t wanna lose her. What do I do?