AIO My bf posted a post and said it was funny

My boyfriend friend(20) posted a post on instagram that made me feel some type of way…mind you were still together and we’ve been okay in our relationship. I confronted him about it and he said “I found it funny” but I don’t think it’s funny to post something like that if you’re in a relationship, perfectly fine and nothing bad was happening. He said I made him sad after I told him I didn’t want to go out to eat with him anymore after I said something about the post. I don’t feel bad…I don’t think I’m in the wrong. My friends think I should leave him, are they right?