I dated a guy for two years, and I really thought I was in love but I know now being out of it I wasn't it was more of an obsession type of thing, and I made myself believe that I was in love. After that relationship, I dated around for a little, and made a promise to myself that i will never tell someone else I love them just because everyone else is doing it, or becaues they tell me, or because i think i am.
I am now in a different relationship, we've been together for over a year, and we have NOT told eachother we love eachother. I care for him more than I have ever cared for anyone else who knows it may be love, it may not be. We've talked about a future together, but both of us know that we've been screwed over in the past and to say that we are in love with eachother if we really aren't is just not for us.
But for all you know you are in love. Just follow your heart, if you feel like you really love this person then tell them, and don't listen to anyone else. And if it turns out not to be love, at least you know and you were able to expirience this. If it's not a forever thing, then it will def. be a learning thing. Best of luck though!