I've always become friends (3mo-1yr) with someone before I even started dating them. It helps to get to know them w/o any pressure of the whole "dating" thing and also lays down a very solid foundation for when you do take the next step. You're already friends so you know if you'd want to date this person or not. Its worked really well for me so far. Im on speaking terms with all of my ex's except for one and she's a druggie whore now so no loss there.
Another thing about being "in love" is that people confuse the hormonal rush you get when in a new relationship for "love". I frequently watch The Learning Channel (ya ya ya, flame me for being a dork) and they were talking about all the chemicals (dopamine, norepinepherine, seratonin, etc) that get released when in that new relationship and as soon as that wears off (up to 6mo or so) you somehow myseteriously fall out of "love". And on to the next and the cycle repeats.
To me, love is when you know in your heart you'd rather die than live the rest of your life without this person, when you're so angry at them you can only see red but still underneath that is love for them, love is caring for them more than yourself and wanting to make them happy because it makes you happy...I could keep going but I think you get my point. You'll know when you're in love and its genuine.