Hi someguy, welcome here
This post reminds me of a 6 years relationship in my 20's. 6 years of living with a girl that left me (sounds unbelievable) at least once a week. She usually left a note but sometimes didn't. I'd come home from work and she'd be gone and each time was as bad as the last. I never did get used to it. Such was my love for her.
So, after 5 years of this occurring I told her how much I loved her but in 12 months time if we hadn't moved forward and she stopped leaving me I'd call it a day.
12 month arrived and it was still happening. The very next day she left again, usual thing. I left also and didn't return. It was tough.
A few weeks went by and she got together with a distant mate of mine. After 8 months or so I met him at a local shop and we chatted. Yep- she was doing the same to him.
Now in fairness she has psychiatric issues. Had a tough childhood from a poor family and had a child adopted when she was 15yo. But one should not remain in a relationship for sympathy reasons.
Twenty years later I was driving past. I dropped in and - she wasn't with a guy. Nothing much had change din that time. She was still and indecisive person. I had no regrets.
You need to be brave. Loving someone that has one or two major issues in life doesn't mean it will work out. Love is but on component. Like heavy gambling or alcoholism. If some behaviours are extreme it doesn't matter how much you love someone.
Finally, don't fool yourself. You are capable of loving another and possibly more because you wont have major unsolvable issues to confront.
Take care and move on. This experience will have its positives.
Tony WK