At 42, Jennifer Lopez already has three marriages behind her ... but that's not deterring her from trying again!

In a new interview with "Good Morning America," J.Lo and new boyfriend Casper Smart both get candid about their relationship and it's possible future.

When asked if she'd be open to marriage again, Lopez replied "Yes, for me the biggest dream is the fairytale. I will never give up on that dream."

"It can be difficult for anybody who has to stand by my side, but at the end of the day I know that I deserve that," she added.

Check out the video above to see what Smart had to say about his famous girlfriend ... and what it's like working for her on current tour with Enrique Iglesias!