I'm not sexually attracted to guys but I think I have a crush?

Hey Everyone,I'm a 21 year old straight guy that has never really questioned his sexuality. It took me until I was 18 to even try with women so my family thought I was gay but I interpreted it as just being shy and lazy. This also makes it hard for me to make new friends. I'm currently dating my second girlfriend who I love immensely. I've always watched straight porn and have never been, nor are interested in the male body sexually. All that being said there is this really cool guy at work who I would consider a good friend but for some reason I think he is one of the coolest people I've ever met. I really want to hang out with him all the time and I think about him a lot. I've never felt this way about a guy before. My thoughts are never sexual and I'm not sexually attracted to him but for some reason I feel like there's more to it.I should say that I'm very comfortable with the idea of being gay, meaning that if I came to the realization I was I would be completely fine with it and be happy with myself for being honest. My family is very supportive when it comes to acceptance so that's not a reason to hide it either.Maybe I'm overthinking this and it's nothing but for some reason I keep thinking I may be gay and I'd be happier if I was?Thanks for reading and if you've been in a similar situation or have any insight I'd really appreciate it!