If you have only ever been with your bf then it would be hard to tell if you have genuine feelings for him or if you are just curious about what it would be like to be with another type of man.

As for the signals - We only notice signals when we want to. It is easy to read into anything but you have to understand that you are only noticing because you want them to be signals. If you weren't interested then you wouldn't notice.

Personally I don't believe that anyone can be 100% satisfied with one person. We always are attracted to other people and curious about what it would be like. The real trick is sorting the urges from the real feelings.