AITA for distancing myself from my long-time male best friend every time he gets into a relationship? NEED OPINIONS PLS!

So I (F) have been friends with this guy (M) for 6 years. We met in high school and stayed close ever since. When he first started talking to this girl back then, I actually helped her get with him. She would call me asking for advice on how to approach him, and I helped because she was cute and his type.

But after they officially got together, things got weird. I know that when your best friend gets into a relationship, you give them space especially when it’s opposite-sex friendships. So I stepped back naturally.

The problem started when his girlfriend began acting strange toward me. She’d be rude, jealous, and overall gave me bad vibes. I told my friend how I felt, not because I was jealous, but because I look out for him and she was acting shady.

Then she made him block me on everything. He stopped talking to me completely. When I tried calling to ask what happened, she was literally on the call with him, listening. He told me I was “acting stupid,” that my reasons didn’t make sense, and basically treated me like I was jealous of their relationship which I wasn’t.

Months later, even though he still had me blocked, SHE started texting me apologizing and trying to be friendly again. It was weird, because she was the one who demanded he cut me off.

Eventually she cheated on him, and they broke up.

Since we have mutual friends, we ran into each other again. I straight-up asked him why he blocked me and stopped talking to me. He told me his ex said I told her I was in love with him (never happened), and that’s why she made him block me.

Later, mutual friends told me he admitted he regretted cutting me off because all I did was warn him about her behavior and she turned out exactly how I said.

Here’s the thing: once they broke up, we became friends again. But I never fully opened up to him like before, because during that relationship he shared personal things I told him with her. Now he has a new girlfriend, and he keeps saying “You can talk to me, you can trust me,” but honestly… I don’t know if I can.

So here’s my question:

AITA for pulling back emotionally and distancing myself every time he gets into a new relationship because I’m scared he’ll do the same thing again and betray my trust?