Feeling guilt over these crushes while in a relationship.

I have been with my bf for 7 years, and we are even living together, going on 3 years come Feb. But lately, I find myself crushing on a neighbor or someone at the gym or someone at work... i do not act on any of these feelings other than to just make small talk with these crushes, but that’s it. Is it human nature to still be attracted to others even though I am in a committed and loving relationship?? I know a lot of it prob has to come from the fact that these men prob possess qualities my bf does not have...