<human>: My boyfriend and I had been together for almost 4 years. For the last year I have struggled with some mental health issues that have put a huge strain on our relationship. This, in turn, has led him to make some decisions without consulting me, which put an even further strain on our relationship. The last few months we've been constantly fighting and I moved in temporarily with my sister (we had previously lived together for about 20 months). I decided I wanted to break up, which ended up culminating in a mutual break up. After the fact though, I came to a realization that an unrealized mental health issue was one of the main causes of our contention (I don't have BPD, but share many of its symptoms). This realization has had a huge impact on me, and I realized that I had been taking him for granted and did not want to break up. I explained to him my changed feelings on the situation and how I was going about getting better. He wanted some time to consider if he wanted to get back together and ended up deciding against it. This is heartbreaking for me, but I know I need to focus on improving my life and getting better. He has alluded to the fact that there is the potential we could get back together in the future (he said he did not want to get back together because he needed time to think about what he wants and focus on himself for awhile). While I love him and would like for us to reunite, how do I focus on improving myself and not on that potential? I don't intend to cut off contact with him as I would like to remain friends and he is going to continue to help me with work related things (as I am transitioning to a new career) for which I am very appreciative. Any advice?

Can you condense the text into a few key points?
<bot>: How do I focus on self-improvement and not on the potential that my ex-boyfriend and I will get back together in the future?