Well he has blonde hair and piercing blue eyes. My hair is dark and so are my eyes. Our facial structures, head size, and build are pretty much the same. I'm a shorter version of him. Our teeth are also the same.
We even kiss the exact same way, but it feels good. Is that weird though?
It's actually not that uncommon. Take a look at couples and people that are together, you will see many a times that they either look similar or at least enought that they 'fit' together. This is perhaps down to some egotistical nature of us humans that find our own features attractive.
I mean, I suppose it is the ultimate expression of vanity, to want to have sex with ourselves! They say it happens, by various unconscious processes, that we tend to go after similar looking people to certain figureheads in our lives. I wouldn't worry about it, you make each other happy, you're hopefully not related!, who can say how similar or different you are in reality, just go with the flow!
I guess scientifically we are all related seeing that we are all humans and of the same species. My sister and I have the same mother and father and we look nothing alike. People see us and think that we are friends. I think that even if you are not related to someone you could still share the similar phenotypes. And you may be distantly related like have a cousin from over 200 years ago that married maybe his grandmother's ancestor from 200 years ago but,maybe the,line broke off somewhere. Again these are just theories.
People tend to be more attracted to others who look like them. Provided that they don't completely hate themselves. Couples also start to "adopt" each others looks as time goes by. They actually very gradually morph into each others' faces, I'm not joking. It's some weird evolutionary mechanism. That's why older couples tend to look alike. So no, it's not strange at all. It's completely normal.
don't be afraid to take a DNA test. lol I am just kidding. with the exception of interracial couples I think that this is common with most couples in my opinion. although I seriously doubt that Halle Berry will start looking like Olivier Martinez