Haven't dated in a while, not sure if i'm taking life too seriously

I haven't dated in almost three years and my previous relationship lasted for 2 1/2 years. It ended with my ex saying we weren't compatible while she had been cheating on me. Ever since then I haven't been able to go on any dates. I think I just can't deal with the emotional stress of a relationship. I don't have any issues talking to women and I've actually made several female friends along the way. I enjoy talking/flirting with them, but that's always been about it. I often wonder if I'm gay (I've noticed guys, but more in the sense of wanting to look like them, not really ever thinking of being "with" them intimately) because I'm not actively seeking women. I hope questioning one's sexuality is common, but this is a difficult topic to talk about with my guy friends... and I don't want to perpetuate the idea of me being gay amongst the women in my life for fear of losing any chance with them in the future.

Anyway, my ex always complained about me not spending enough time with her. Don't get me wrong, I found her extremely attractive, but at the time we were in University (paying my own way, so I had to fiscally balance my own future on top of ours). At the same time, my ex's sisters and parents routinely told her I wasn't good enough for her/I was disgusting (looks-wise) and treated me as though I was third-rate garbage from a lower income class. I suppose the negativity really got to me and I was always mad at how they viewed me because I've always thought of myself as a nice/kind-hearted/Clark Kent kind of guy. Needless to say, when my ex left me for a fatter, richer, balding frat-guy type... I lost my mind. I tried being emo, I drank my sorrows, and failed many times at chasing easy women. About a year & a half ago, I thought that maybe dating wasn't for me just yet, so I decided to clean up my act. I figured it would be best to emphasize my efforts on a great career, seeing the world, getting some interesting hobbies, shedding some pounds, and experiencing the "bachelor lifestyle". After being with my job for a year, I like where my life is leading, but at the same time, I feel the pressure from those closest to me. My best friends are finding the women of their dreams and settling down in their early 20s. I'm afraid I'm straying too far from the dating scene, but I'm only interested in keeping things casual -- nothing too committal. I'm not sure what to do. I suppose I'm looking for some reassurance that I'm at least somewhat normal with my decisions.