Do i have a right to be mad/hurt? (Long)

My son is 4 almost 5 months old and the father & I have a complicated relationship. When i got pregnant we had been dating 6 months but we weren’t official. Exclusive but not official. He didnt want to rush things (his words) but then I found out I was pregnant. Not planned, I had the Nexplanon arm implant. We both agreed not to complicate things and I didnt want him to feel obligated to be with me because of the baby. Before the pregnancy i did want to be with him, but like I said I didnt want the baby to be the only reason he made things official. So during my pregnancy I told him we should just put the romantic part of our relationship on pause. I didnt want things to become messy, I just wanted to be good coparents.

We spoke everyday, we hung out, he checked on me and it was nice. There were times where he kissed me and wanted to go further but i shut it down. He still didnt want to be official and i refused to be the booty call any longer.

After i had our son, we remained friends. About two months ago we spoke about becoming more than friends. We started talking again, but this is where it got more complicated. A month ago he tried having sex with me. I told him no, that I wasnt going to have sex with him or anyone else until I’m in an official relationship. He said he didnt want to be official because he felt like I would cheat on him. Which was so random because I’ve never given him any reason to doubt my loyalty. I dropped it and stopped speaking to him in a romantic way. A week ago he apologized for what he said but explained that he felt I was speaking to more guys because of my social media page. Sometimes I do post pictures of myself, and men that follow me comment. I dont reply and most of the time i delete the comments anyway. I explained that, but he said it was hard to believe. He said I was the only one he was interested in, and ever since he found out about my pregnancy he hasn’t spoken to girls, but that he doesn’t want an official relationship just yet.

But yesterday a good friend of mine for almost ten years messaged me. Even though I have been friends with her a while, we haven’t seen each other in almost two years. We speak on social media sometimes but we’re more like acquaintances now. Anyway she told me that the father of my baby had been messaging her. Asking her out, calling her beautiful, sexy etc. just trying to get at her. She showed me the messages and most of the time she didn’t reply and when she did she rejected him. I confronted him about it and his excuse was “how was I supposed to know she was your friend?” He also said that who he messaged wasnt any of my business.

And yes I understand we aren’t together, but Im just more hurt he lied about me being the only girl he was interested in, that he led me on, and accused me of doing what he was doing all along. I told him I no longer wanted to speak to him if it didn’t have to do with our son. I told him that it’s embarrassing knowing what he tried to do, and that this made me completely uninterested in him. If i could cut him off completely i would but obviously i cant. He thinks im overreacting but i dont. So do i have a right to be mad and feel this way?