Friends boyfriend

My friend has been in a relationship for the last few of years, but their relationship was a secret to most people. She introduced me to him in 2019. Most of us were drinking, except my friend (was pregnant). Well, we went to a bar and I went outside with my gay guy friend and his friend. My friend stayed inside but her bf was wondering around. When I was about to head back inside, her bf stopped me and asked if I could go talk with him in his car. We were both pretty drunk already but I looked at him and said I’d rather go inside to sit with my friend.

I wanted to tell her right away but I didn’t because I wasn’t sure how she would react. She was driving me home after dropping him and his friend off when I told her. She just said oh and changed the subject. I didn’t mention it again, but ever since that night I have not liked him. I just see red flag after red flag. My friend seems to not notice the red flags.

Now, it has come out that he has been cheating on her with a couple of women from work and from his past. Even had her contact name as Lyft.

And well that’s it. I just needed to get the first part off my chest. I’ve only told my friend and mom. My mom thought it was very fishy too that he asked me to go in the car with him. I don’t know what he wanted. He was drunk and I was drunk and it was the first time I had met him.

Am I crazy or is that not suspicious?? I’m not sure why my friend didn’t believe me at first.