What was the reason for breaking up?
Not a single particular event, more so a combination of factors.
Wasn't happy with myself, a bit down in the dumps perhaps and would choose to spend a lot of time alone instead of time with her. We would pick at each other for small things, then let those spats spoil greater lengths of time than necessary. Had been living together for 6 months, which isn't an easy adjustment.
Think after such a long time together we both began to wonder if the grass was perhaps greener. I don't feel like that anymore. She has made thinly veiled excuses to speak to/see me since (I have kept my distance, never text first - in the past I have always been the one running back) and we get on great when we bump into each other.
I've been quite worried of being 'firm' with her in the past in case of causing more drama but on the occasion that she discovered I'd been seeing somebody else and decided to text me sarcastically about it, I told her not to speak to me like that and received an apology (rare).
Feels like I've made a lot of self-improvement in the half-year since, have learned how to have fun and respect myself. The result of which is that I feel a lot more accepting of my own and her flaws and could be a better partner if given the chance.
I threw myself into dating and for a while felt that it was getting easier. But now we are speaking more and I'm unsure whether to keep it going as is (almost like a slow re-connection process, but also quite mentally exhausting) or to ask how she feels (but worried it comes across as some form of ultimatum).
TL

R Feels like we split as we both neglected the needs of relationship. Don't think we ever stopped being best friends and whenever we see each other now, it feels like catching up with a best friend you haven't seen for a while (there is little awkwardness, could talk for hours).