Depends on the person, really. I'm 29 years old, and I've been in love "only" 4 times. Some people are desperate for it, some aren't so much. The four girls I have been/am in love with all possessed certain traits I am looking for in women. I figure when one falls in love so often, maybe they're surrounded by ideal mates like that. Man, do I like that idea!
Love is weird. The right kind of weird, sort of like a Haruki Murakami novel, that's odd as hell, but it's a good kind of weird. It's the sort of weird you need or didn't know you needed.
It's also weird how for me, personally, I'm still very pro-love, quite hopeful about and all, despite that fact that most of the girls I've loved were unrequited. Now that's fun times...yeah...
"How do the angels get to sleep, when the devil leaves the porchlight on?" -- Tom Waits, 'Mr. Siegal'