How do I determine if he’s still seeing his ex?

Anonymous

We’ve been dating around two months. He recently got out of a two year relationship but he’s known her over ten years. She cheated on him and he broke it off. She still wants him back though and will tell me they’re still together. I ended up blocking her bc of drama. He said she makes stuff up and they’re not still together. I told him of my concerns that part of him still loves her. He said ofc he would still have love for someone he’s known 11 years but he’s not in love with her like he is me. Having lived together and stuff tho he still will have her come over to get her stuff or they have other things to take care of. One morning she got his phone and sent me pics of just her or of him sleeping from the doorway saying they’re still together and I’m stupid. He said she came in and did that while he was sleeping bc he had asked her to stop by that morning to help with something. i also found an ovulation test sitting on the toilet that hadn’t been there a few weeks before. He said oh that was stuff she had she was trying to get pregnant before.
some of the explanations seem to add up others don’t. I don’t want to be stupid and mess something good up if he’s not doing anything. at the same time, I dont want to be stupid and they’re still fucking while I think we’re in a relationship. It also doesn’t make sense to me that I’ve told him multiple times if he wasn’t ready yet or even just wanted something more casual to just tell me that I was OK with that. He insist though that he likes where we’re at in our relationship and doesn’t want it to change. He even keeps trying to get me to tell my mom we’re dating she actually knows him. It’s like some of the signs are indicators of someone serious, and others look like someone who still isn’t done with their ex. I want to ask her if she Has any proof of them still being together but she tell him and I don’t know where that would go. Not sure what to do here

How do I determine if he’s still seeing his ex?
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