I feel conflicted

My bf was at a wedding performing (he’s in a band) and I was at work. I told him to have fun, text me when he cans. So he texts me and asks how I’m doing then he sends me this

Now, he’s not in a known band. Mainly it’s family friends that ask him and his dad/brothers to go. But sometimes I feel like he acts shady and I want to cry because I feel like I can’t trust him sometimes. & i know it’s stupid to be in a relationship with someone you can’t trust but it’s also hard to let go of someone you care about. I just tend to think of the worst case scenarios & let my insecurities get the best of me. The way he worded it saying “just in case” is what gives me an off vibe because it’s not like I’ve ever questioned him about something he posts except for one time when he posted a picture with 2 almost half naked girls with the caption “they wanted a picture with the boss”

That’s the only time I’ve ever commented on anything he’s posted, so now that he says this, I’m letting my insecurities get the best of me again. Also, these insecurities rooted from a past relationship where my ex dumped me for a girl he had just met after 2 years together. He was my first serious relationship so I’m afraid of that happening again..