It is possible to "love" someone without knowing them very well, however, the type of love that you have described sounds more like an infatuation/obsession to me than love. I'll try and explain what I mean. An obsession about someone means that you have such strong emotions about that person that you feel that you must have them no matter what e.g. "I just can't forget about him and find someone else" and you become addicted to this person and believe that you need them above anything else. It can become irrational and destructive e.g. "even if I found out he was a criminal ..... I don't care about that either" or " maybe I will find some things about his personality that bothers me. but I can overlook it". Also finding that you are continually thinking about him is obsessional. I believe that you are infatuated with him as well because you believe that he will fulfill all your fantasies e.g. "I think we could have a good relationship" and you can only see the good "very kind, respectful, gentle eyes ...". It's difficult to explain but there is an overlap between infatuation and obsession.

It's great to have all these wonderful feelings and there is nothing wrong with being infatuated as long as you do not let this become an unhealthy attachment that affects your well being e.g. not looking at other guys, making him exclusively the object of your desire, dreaming and fantasizing excessively about him, etc.

Maybe if you look at it like this: infatuation is emotional & chemical (desire & lust), obsession is physical (addicted & need) and love is spiritual (in your heart & is shared).

Just be careful that you keep your feelings in control since it will be very painful for you if you can not have what you so much want.