It’s complicated

My ex-boyfriend and I broke up towards the end of November because we anticipated a lot of stressors during the spring semester. We’re both college students, but he’s only during part-time college because he also works full-time (12 hour shifts sometimes during days he has school). He is in the process of transferring to another school to finish his bachelors and he anticipates needing 2-3 more years to finish. I, on the other hand, will be graduating in May with my bachelor’s degree. We’ve been talking every single day since the break up and even met up twice (no sex or physical affection happened) before I left the state for winter break. During the holidays, he kept messaging me and snap chatting me. He even sent me videos of some of the things he was doing during his family vacation without me asking. One night, I asked him if we could chat for a bit through a phone call. He agreed and we ended up spending the entire night on the phone just talking about random things and occasionally flirting. Later in the call, I admitted to still having feelings for him and wanting more than to just be his friend, though I was the one who brought up the conversation about ending things between us in November. He heard me out and basically told me that in previous relationships (he was engaged at one point) he hasn’t been able to balance doing well academically and work full-time and balance a relationship. He doesn’t want to sacrifice his academics for the happiness and success of a relationship. I am an incredibly good student and held myself and him accountable during the time we dated, but this was not sufficient to prove to him that I wouldn’t mind if he focused on his academics and tried to balance our relationship. He eventually said, “look, the simplest way I can say it is that it’s not you, it’s me. I need to focus on myself right now and make sure I do everything I can to achieve this goal I’ve been wanting for the longest time.” It broke my heart but I thought I’d finally heard what I needed to hear to move on. Yet, we’ve been talking every day still and it feels like nothing has changed between us. He told me he won’t be dating for awhile, but the thought of him eventually dating someone else breaks my heart. We agreed to stop being friends once either of us starts dating again because we’re both relatively jealous and petty people. What should I do? I’m convinced he’s the one and I can’t stop holding onto the hope that we’ll get back together.