I know this might sound dumb but like I have a girlfriend who I love lots everything is right with her, when we kissed, it was beautiful. I've had 3 boyfriends, when I held their hand It didn't feel the same as it does with girls. Am I lesbian or bi? Sorry ;3
Rather than the sex of the person, it might just be the person/personality of your girlfriend that you've clicked with. Are you sexually attracted to men? Romantically attracted to them?
And since you have a girlfriend and making this thread, I'm assuming you are both sexually and romantically attracted to women? If so, as far as labels go, I would say you're a lesbian.