He called his ex beautiful

When i was around 18 weeks pregnant i found out my partner had messaged his ex girlfriend and called her beautiful.

What had happened ( from what he said) that he had found out his best friend had his ex on facebook and he was angry about it. He wasnt as mad at his friend then he was at her, so when he was drunk he sent her messages about how he wasnt happy she was talking to him. He told her he thought she was beautiful....thats bascially all i got told as he deleted all the messages so i never saw the conversation. We argued for a week but i got over it....or so i thought 🙄

I recently gave birth to our son a few weeks ago and ofcourse ive been feeling a little insecure about my new mama body...NOT because i feel depressed about it or regret it at all i appreciate my body for what it took to make my gorgeous baby....i feel insecure about him because of that incident...shes all skinny and dolled up and wears sexy clothes. I just feel so stupid and ugly around him. I miss someone making me feeling sexy and actually mean it, i feel like hes just with me cause girls like that have fucked him over but i cant help wanting to feel beautiful or craved its in our nature.

It never bothered me him not making me feel sexy before this incident cause i thought he wasnt that guy....but cause he got so jelous and complimented her it makes me feel like he doesnt find me sexy. Any advice??