Apologies if this is long or just a ramble I'm struggling to get my head straight and could really do with outside views.
Straight to the point I haven't had the best run of relationships romantic or platonic at some point they have turned bad due to some form of abuse directed at me.
My ex and I split 2 years ago just before I found out I was pregnant with my youngest due to the fact he was a selfish arsehole and could never put us first even during pregnancy. Since we split he has worked on himself and generally done a 180 flip and now is really supportive and has become less selfish has been more consistent with things and generally how he should have been when we were together. He still has the odd slip where he just doesn't think about how something will affect the kids but on the whole is a far better person.
About 3 weeks ago we decided we would give it another try and it's been good we haven't had the honeymoon period we had first time but I never expected that as we know each other so well and it has been good and we've spoken and if things are still good in 6 months then we will look to him moving in the family home. He's happy kids are happy I was happy but the past week I'm struggling I feel flat and while everything is nice and settled I'm worried I may be sabotaging things.
I don't know what's set it all off but I'm questioning loads of things like decisions I've made in the past and if things would have been different had I chose the other way. I don't completely regret things as if I hadn't made my choices then I wouldn't have my kids but I question if things would have been better for them if I had made different choices. One of the choices I am questioning is to do with someone who was a friend who I ended up cutting contact with before I met my ex now bf. He told me he had strong feelings for me and I freaked and wasn't sure how I felt and we ended up cutting contact as it became very awkward. Looking back I do regret how it ended. I don't even know why this has come up I haven't thought about him in nearly 7 years.
Part of me thinks at the moment I should be really happy as I'm getting what I wanted first time round with my bf but I'm not. I really don't know what's wrong with me and how do I stop feeling like this? A friend thought it could be depression but I've been depressed for a long time in the past and it doesn't feel like that and I'm normally really good about picking up on when it gets too much and it just feels different. I was told feeling like this can be normal in relationships but is it normal 3 weeks in even if it is with someone who was an ex?
Sorry I'm rambling any advice would be appreciated.
TIA