Am I fucked up for this?

My baby daddy and I broke up a while ago. I recently started talking to his “ friend”. He hangs out more with the brother than “ friend”. So, i was looking for someone to go to the movies with so this “friend” said he would go with me. We went and it escalated quickly and we ended up liking each other a lot. This was not planned at all. My baby daddy found out that I like this “friend” and got super mad, started calling me names and called me sheisty. In your own opinion , am I fucked up for liking him? should I back off?