I need some man advice.

I’ve been with my SO, for almost 5 years.

We have a two year old daughter.

My SO has a female friend, let’s call her LISA.

Lisa and my SO have been friends for over 10 years.

Anyways, LISA, started to come around a lot when I was pregnant, almost every weekend and my SO and I never really had any “alone time” it was always us three.

Once our daughter was born, Lisa was coming over almost every day/ every weekend. Wanting to go to the gym late and night with my SO & go for late night drives and meals.

I at first let it go, brushed it off but then there was a few times where he would lie to me about going out with her.

Lisa also was always excessively touching him... almost all the time. I started to get really uncomfortable with it... then she always for some reason wanted to share drinks with him, sit with him & even share food.

I started to get even more uncomfortable with it and told him I’m not okay with it anymore.

I then removed her off my social media accounts and completely stopped talking to her after she thought it was a funny joke to sit on him in her very tight skirt while he was face down on the couch as I was tending to our 5 month old at the time.

History on them? They had sex a bunch of times before, they also showered together before as well, etc...

My SO says it’s not that serious and I think it is, but he’s dismissing my feelings constantly. Help.

Am I in the right? He says because they’ve always had a “ touchy “ relationship, I shouldn’t let it bother me.

This is also not the first time he’s done this with a girl.