Is this cheating or otherwise suspicious or am I just overthinking/overreacting?

I can't believe I'm even typing this, but I think my boyfriend may be cheating on me. I don't suspect anything physical yet, but I do suspect emotional cheating in the sense I feel like he is lying about being in touch with an ex still. Here are the signs/issues -

1. He either has her on Tik Tok as a friend or he at least has it set where he finds out when she posts something. He didn't tell me this directly. I found out when I saw a notification from her come up on his phone.

2. He doesn't have her on Facebook but he has a family member of hers on there (and lied about who it was at first - someone else had to tell me it was her relation). He does not acknowledge OUR relationship on Facebook. We have a small child together and our child is on his page but I'm not. She has her boyfriend all over her Facebook page and says she is taken.

3. He tells me he loves me and doesn't want anyone but me, yet he acts weird. He stopped telling me goodnight/love you before bed (super odd) but will still say love you throughout the day and still kisses me. We still have sex. He doesn't hold my hand in public anymore. He doesn't really help me with much around our house or do much with me. He usually plays video games or just does his own stuff.

4. He has told me before this ex was pretty bad. Other people have told me they hated her too. His friends and family have told me she was awful for so many reasons and very rude. They told me they like me A LOT better because I'm nicer and I actually socialize with everyone and participate in activities. I guess she didn't and was just kind of really antisocial and never wanted to hang out with anyone or do anything. I always go when we are invited out. I have a good time with everyone.

All this makes me wonder though. Does he still have feelings for her? If he was truly over her, why would he have her on Tik Tok and stuff? He shouldn't care about what she is doing anymore and she doesn't need to know what he or WE are doing.

Is this cheating or otherwise suspicious or am I just overthinking/overreacting?
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