What is love(i need to know if what i'm feeling is what i think it is)?

i've been in situations were i have infatuated in the past like i couln't live without someone, with someone who has no or little feelings for me. But the question is, i've been seeing this girl for a while and i love everything about her,she is pretty, i really care about her and i want her to be happy.also i think (i know) it would hurt if i lose her and i don't want no other women but her. And still, eventhough i really believe that i love her it is not as intense as when i was infatuatining over somebody who didn't know that I EXSISTED.so people who have or are in love is that what love feels like?