Is it normal to get crushes very easily?

I'm a virgin guy and I seem to get crushes on literally every girl or woman I see, as long as she looks like she takes care of herself and seems nice. However I have never approached any girl because I'm shy and afraid that every girl will laugh at and humiliate me. When I see a couple in public I almost always immediately become jealous of the guy. I would like to be in a relationship but I always think that every girl will get bored of me very quickly because I don't have much of a social life and don't really have any cool hobbies or interests. I literally feel like I have nothing to offer so why would anyone want to spend time with me anyway. Obviously, being a virgin I am inexperienced sexually and probably would never be able to pleasure a girl. On the other hand, despite having these thoughts, I also wonder that because I am attracted to so many females and so many different types of females, that my mind would inevitably wander and I would find it difficult to stay loyal. I just don't know anymore. I want someone so bad and it hurts. It hurts that I see so many girls being cute and flirty with their boyfriends and I can't ever get to experience that. I know I will be lonely unless I put myself out there but it's all too scary and intimidating. I just feel like so many things can potentially go wrong in a relationship.