I've been asked this question a lot lately. Maybe because I'm dating someone now.
This question does often come up in my mind. Do I like the guy I'm dating? Would I consider marriage in a year or so? Would he?
I think it truly depends on if you both are truly compatible. Marriages end for various reasons. Do we take the plunge again and hope it works a second time?
On another note - my step-brother just got engaged. He's been seeing his gf for less then a year. He's in love with her and she him. He lost his ex-wife due to cancer last December. I wished him well and a sincere congrats. It's great being in love and knowing that your second 'love' makes you happy enough to want to get married.