Love is taking out the garbage from her apartment to the dumpster, even though you don't have to.
Love is noticing the little things. Love is putting someone else first, before you ever think of yourself.
But with all these nice things said above, Love is most definately a give and take relationship, you need to get out of it about as much as you put in. In other words, you shouldn't be completely subservant to your spouse. You need to think critically and intelligently. Don't be afraid to call them out of stuff, it's part of being in a healthy relationship. I think people now days don't understand how to have good meaningful relationships with other people.
Have I been in Love? Why yes I have. In fact, I was the most dissenting, unenthusiastic, and the utmost non-believer in Love. Until, I met that one girl.
I'd had girlfriends before and all that stuff, never really even thought Love was a real deal then. Then, out of fucking nowhere it hit me like a freight train that just drank a powerthirst. Even then, I told myself that it wasn't possible, that there wasn't anyway I could possibly be anywhere near the 'L' word. "We'd only been dating 3 months, these things don't happen to me, I don't even like romance movies." Were just some of the things going through my head. The relationship lasted about 1.5 years, then we both mutually decided that we should start seeing other people (the last 6 months was a distance thing.) I still speak to her from time to time, and it's just been great being able to know her. But, it was one of those things that had to end. I'm not sad about it. I've moved on, started dating other people and such. In fact, the girl I'm dating right now looks rather promising.
@OP and others. I think the whole, "OMFG! I'm in Love and I met her last week!" thing is bullshit and mostly derived from people with low self-esteem and poor self-confidence. They need someone else to leach off of, because they can't do anything well by themselves.