I have been with my current boyfriend for almost a year now, we are so happy together and he is 100% the best thing that’s ever happened to me. There’s one problem though, his younger brother is the same age as me and I have a huge crush on him. We visit his family a lot and every time, I am just reminded of my crush. I would never ever cheat on my boyfriend but sometimes I feel really guilty for having this crush. I guess I just feel like I’m “mentally cheating” or something. I just don’t know what to do.