I have to agree - beautiful dress! It's a very pretty style, and fits you to a tee.
When I think of love, or loving someone, I think of it as a verb - an action word - rather than a noun - or just a feeling / thought / thing. For me, my personal definition of love is what happens between people, and something people DO.
I think that if someone feels like home, if you feel more comfortable around them than anyone else, if you feel more like yourself around them, or maybe like a better version of yourself... if you think about their feelings, needs and wants over your own, if you would rather work issues out instead of preferring to "win a fight", if you actively do thoughtful and helpful things for them (small or large) and if you'd rather think of a future with them than without them... that's what love looks / feels / sounds / acts like in my book. (It's a lot of other things to me too, but you get the basic idea.) Using that definition, to me, it takes a while to really love someone - because it takes a while for them to become that big a part of your life.
I believe it is fair to think that someone can love someone else at ANY age, so sure, you could really be in love. I don't see any reason why feelings of love should be considered invalid or impossible just because of your age.