There's really no right or wrong definition for "love, being in love and true love"
All I know what love, being in love and true love is for me, is that you'll stick with each other no matter how hard it gets in the relationship. There will be times where you would feel like breakup is the answer but you just can't let them go. You forgive them the next day for their mistake and even if they did the same mistake over, you still will forgive them. Holding on to each other through thick or thin, conquering bad temptations, sacrificing, changing yourself to make it work (depends), adjusting your life to "our" life, turning "I's" into "us", and so much more.
Uhmm.. May I say this? I don't understand why people keep thinking that I'm comparing love to being in love and to true love? LOL I mean, if I did then that would make me sound so stupid. Lol I'm only saying that there's a difference between being in a relationship and being in love. Lol
And yes, I do agree with you. Love is about going through thick and thin and still sticks together. It's about sacrificing for the one you love and loves you back... and like I said, "Love is about being in the middle of the thunderstorm and comes out still holding hands." So I guess, our definition of love isn't so different, huh?