Does my boyfriends best friend sound like a creep?

[oIiIo]

My boyfriend has an ex gf named Ashley. They broke up last year after only five weeks. They'd been hooking up on and off for years in between my boyfriends actual girlfriends. They got together for a few short weeks when his dad died as a comfort to him . I looked at her Facebook profile last week out of curiosity. I noticed that my boyfriends best friend (who is engaged) has been liking all of her recent pictures where she did herself up (he won't like them if her new boyfriend is in the pic with her). The only other important fact is that they all went to high school together and they have all graduated college at this point. I immediately felt sort of insulted but my friend says I'm an idiot and that his best friend is really being a weirdo and that it's HIS FIANCÉE who has someone to worry about . What do u think of the scenario. I felt almost like maybe he prefferred my boyfriend to be with her and not me