<human>: Can you summarize the given text in a few sentences?

We've only been together for a month, but we were together for a year prior to this. (We broke up for a few months inbetween). 

I have a lot of residual anger left over from the break up, but decided to give it another whirl after he very sweetly asked if we could get back together. Right now we're taking things slow, which is ok, but as time progresses his personality is really starting to upset me. He's very inattentive. He often ignores me. He's flirty with other women. Nothing he's doing is particularly "bad", it's just not what I'm looking for in a partner and I'm not happy. 

I've mentioned my need for more time with him, but nothing has changed. He's left me no choice. I know I have to end it, but I'm terrified. 

I loved him a lot and I'm not getting any younger. I don't want to be alone. And a part of me feels I won't find anyone better than him. That I should just put up with the unhappiness. And I'm also scared because I know me. I'm going to break it off with him, regret it soon after and make an ass of myself trying to apologize and get him back. The fear and sadness will take over and I'll be right back where I started. I'll rationalize all the issues we have in the relationship and blame myself. Dumb. 

So I need a little help. How can I break it off and keep it off?
<bot>: Our relationship isn't working and I know breaking up is for the best, but I'm scared and need a little advice on how to not hate myself afterwards.