I found out he had a gf the whole time…

TL;DR;: Me and him have been in this talking stage for a couple months. We got very close but I found out from his girl that he has a gf. How do I heal from thinking everything a man says is a lie?.

It’s exactly what it sounds like. me 23F and him 26M have been talking for months, we have actually gotten super close and I was getting excited for the relationship. We had our ups and downs but kept going but recently he had called everything off and said that he wasn’t ready for a relationship. I was already feeling broken from this but I got a come over text from him and all this weird shit and we were already ending. I got incredibly angry so when I saw the “come over” text I played along. I genuinely was gonna go there to yell at him and give him the notes I had been writing about him. Turns out it was the gf the whole time texting from his phone. When I got there I got the notes in my hand and stepped out of my car, he was coming down the stairs and I thought that she was a random person in the complex. Nope, she introduced herself and my whole body got hot. I was already fuming from thinking he had the audacity to ask me to come over to have sex. I went off in him and answered her questions and everything. She wasn’t mad at me and expressed that this has happened before within the FIVE YEARS they have been together. I kept going off and off and answering her questions and eventually she was done. She said thank you and sorry for wasting my gas and time. And I apologized because I genuinely didn’t know.

Any advice for my mental well being? I have this feeling that now I can’t trust anything anyone says or does for me. How do I heal? I’m not super heart broken but now I’m completely hopeless to trust another man again.