Love is absolutely a real thing.
When you just find that one person in your life you can't stop thinking about. When you want to know them and every facet of who they are, were, both physically and mentally, and when you never want to be away from them, or can't stomach the thought of it.
When that person becomes your other half, truly, where you're incomplete without them, those feelings are least the start of feelings of love. It goes so much deeper from there too, and there is no better feeling than when you feel like that, and the other party shares in your same passion; to be loved back. That combination, that potent powerful combination built into us all, that pulls us all together, that is close to what I could actually define as 'love'.
It's true I feel like the word is tossed out far too loosely and hastily these days, so the concept of what it really means has been either cheapened or forgotten, but when you really find it and it's a nice slow burn, there is no better feeling when all that is reciprocated back at you. Everything makes sense for the first time in your life.