Is it wrong of me to have a problem with my boyfriend going to a concert with his buddy who also has a hotel suite for afterwards?

A hotel makes great sense if there's drinking involved, to avoid driving under the influence, and a suite would allow each man to have separate sleeping space. It also makes sense if the concert is fairly distant, as most concerts start pretty late in the evening and it's not a lot of fun to be on the road very late at night. And a hotel suite is, plain and simple, a bit of luxury almost anyone would have trouble turning down. If you're worried that the suite becomes the location of an after-concert party with single women in attendance, then yes, either you trust your boyfriend or you don't.

They don't drive home drunk, stoned, exhausted and in the middle of the night. I can not fathom why you would think anything else.

If the concert is far, then that makes since.