Can someone be in love for that long..?

My current relationship is probably the longest I've ever been in. 2 years and couple of months in. And I love him, so much, I would think so. At least for now. I don't know in the long run. Usually I'm afraid I love too much and didn't get it reciprocated. But recently I'm afraid I will fall out of love eventually. Just bcause... I never had experience being in a long term relationship. And even now, we are in a long distance one. What if we live together? Would it be better or worse?

Another reason is he may not be the person I will look up to, eventually. Ahh... I dunno...