I don't want to drip feed so apologise in advance I'm looking for some clarity and good advice.
Back story. I was in an EA relationship for 3 years. My sister passed away too and was a very horrific time for me. After spliting with EA partner I met with a friend I hadn't seen for over 10 years, we started a relationship etc. He has 2 children, 2 mother's. 1 DS and 1 DD. After split DD mum text DP and said she couldn't stop thinking about them having sex etc. Since it's made it difficult for me to be okay with them texting all the time. DD lives 300 miles away and DP drives every month to see her. He has stayed at ex's house whilst visiting Dd. I said I didn't think this was okay considering she still wanted a relationship with him, he agreed and said he would stay elsewhere in future which he has DoNE
This Christmas. Due to a few reasons, death of my sister, parents separation and impeding custody case. I stupidly overdosed. My son was with my mother and I hit rock bottom. My DP made sure I was okay but left next day to visit DD. This was fine. He ignored me the time he was away but upon return admitted to staying at ex's house and said she was away at the time.
AIBU to feel betrayed he stayed at her house and worrying now every time he stays away?