Been with DP for 6 years, recently engaged and now reconsidering the whole relationship.
When we got together, his ex was around a lot, she's the cousin of his friend and would always go to friends house whenever DP was there. She wanted to get back with him, he did not. If he ever called me while at friends house, she'd always be in the background shouting stuff at me, e.g. 'put your d**k away DP name' 'get back in bed', just things to wind me up, his friends could also be heard in the background so knew nothing was happening. She did this for about a year, would always message him and such.
Anyway, in the first month, every day that he finished work, he'd call her or her, him, only for a minute or 2. He also went to breakfast with her and his friend.
3 months into relationship, she was still causing issues, which I spoke to DP about and he said he'd stop talking to her but he didn't.
It was new years eve and we planned on spending it together, he was on his way at 6pm, 7pm came, tried calling, phone was off, he never showed up. 12:30am I get a message from his ex saying 'I know something that would destroy you'. Find out the next day, that he stayed at his friends house on NYE while his ex was there, he was also aware about her messaging me. He told me he didn't know what she was talking about and she was trying to wind me up again.
6 months into relationship I tell him I won't continue relationship if he stays in contact with her, even if she's over his friends house, he says that's hard, as he doesn't want to be rude and disrespectful towards the family.
Eventually after a year she backed down and he stopped contact and met his friend elsewhere.
About 2 months ago, she told one of his friends that the 2 of them went away for a weekend, which he didn't, he was with me.
Since all of this, I've asked him on several occasions if he has ever done anything he shouldn't have and he's always said no, but there is a small part of me that doesn't believe him, like I feel like something happened on or before that NYE.
I can't get that niggling feeling to go away, I mean I know it's probably all innocent but I just don't know what to do