I don't know what to do
. In December I found 2 years worth of messages on DPs phone to a woman who he had met on a lads weekend away abroad. I messaged her (without his knowledge so he couldn't prewarn her) and said I was his girlfriend and had seen all the messages and could she please tell me what had gone on the night they met. She was mortified, said she had no idea he had a girlfriend and said they had kissed. One of the messages refers to 'the long deep chat' they had by the pool until the early hours of the morning. And all his subsequent messages pretending to be single and being flirty just make me feel sick still. She is abroad so I know they haven't met since.
I lost my shit at DP, we split up for a few weeks but got back together. He is really trying, his moody behaviour has improved and his overall treatment of me is better. He said he didn't consider our relationship that serious before and acknowledges he treated me like shit before but now wants to move in with me etc (which he never wanted to do previously). He has deleted the woman off Facebook. But now I'm stuck in this cycle of feeling like I'm over it and being happy again and then I'll suddenly remember and get upset and cry or get fucking furious and shout at him and ask why I wasn't good enough. I never really got answers as to why he did it when we split but we had another talk a few weeks ago and he admits he messaged her to stroke his ego and enjoyed the attention.
I go through periods where I'm really affectionate towards him and others (like today) where I'm off and short with him and just hate him for what he's done and what kind of person he's made me. But I know if we were to split again I would be upset and want him back
. Whenever we argue I bring it up and he's asking me when I'll get over it and if I'm going to bring it up forever.
Can I get over this and move past it or will I always harbour this resentment?