I'll be honest with you here... I'd describe it as a wild, almost uncontrollable need to be a part of that person's life. A passion, really. Yes - in fact, the best way of describing it is if you lost everything - your job, your home, your car - but that person was still by your side, none of it would really matter.
I didn't want him to be the one I avoided because he'd hurt me. If I was just his friend, then I would still be blessed. If that meant swallowing my pride and being his shoulder when he got hurt, or being the one he ranted at when he was angry; I was prepared to do it and to do it with dignity.
I'm cautious with the love word because I really know what it means. I've been there, done that and I know what the implications are. I also know that people say they love people when they don't, and it often results in tears and avoidance of bars, supermarkets, even whole towns in extreme cases.