She made it clear that this was all conditional love on her part
Conditional love is not love, it is manipulation, it is emotional blackmail! You accept the person you love as they are, faults and all. If you don't accept them that way, it isn't love. Read the standard wedding talk scripture with her, 1 Corinthians 13:4-8 . Ask her if she is willing to jointly commit to be patient, slow to anger, record no wrongs, trust, and persevere.
She deserves better than a life of sorrow with me.
You deserve better than a life of sorrow with her! She is responsible for her own feelings and actions. It seems to me that much of her sorrow is self-inflicted. If you moved out, would that make her life bissful? Not likely!
We were happy again, like at the beginning. Like it was supposed to be. I failed to keep it that way.
It takes two to keep it that way. Of course I don't know all the details, but from what you've said it seems like you are making an effort, while she is the one expects life to be exactly the way she wants it, with little or no effort on her part.
Most everyone here has real issues, and...you're made of stronger stuff. Probably just laugh it off and tell me to get over myself.
#1: This is a real issue, one that many here have been through. I'm not about to say laugh it off. This is no laughing matter.
#2: It's not about being "made of stronger stuff", it's about finding out who you really are inside and letting that real self take control.
#3: You don't need to "get over yourself". You do need to realistically evaluate where you stand, what chances and options are available to you.
Take care, SD, and don't put all the blame on yourself.