it's too late for me to be up- More BF

first and for most I had sex with my ex again. And the 1st time I went to his apt and a girl came by. I found the entire episode funny. Then the next night he came by because we couldn't finish the 1st night it just wasn't the same. ( I  need to go the GYN I think I'm going through the change.)Next is my BF is stress me out I wrote in a earlier Journal that I'm trying to be a Best BF and that's gets hard and tired quick. I feel like she's not making the best decisions for herself at this moment and don't seem to have her mind on the things that should be important. I know it's her life but it's frustating me ,cuz we talk about it almost everyday because that's what we do even if thrr was no problem. So now we're left on this same discussion about her "problem" and I don't want to talk about it anymore. I don't have much going on in my life and I don't have much to say and today didn't even feel like talking. And that's not like me. Question: How much time is enough time? She and I are so different , I'm early and she's late, she like young guys and I like older. I would've fixed this problem or start trying and not let it bring me further down. I Notice that with BP ,I can let myself get too far down into depression. I have to fix myself real fast or it's down hill from there. So I have a reason to move fast when I feel myself slipping. And I'm a talker and a mover. That's another reason I know that my sucidial idealation went bad cuz I talk too much. And I never want to go there again.So how do I love/help my BF and not let her negative world influence my positive? We do tend to bounce off of each other!!!!  Pray for and be blessed.