5 traits a guy should have before you get serious: definitive research sheds light on the qualities that really matter in a dude when you're thinking long-term love.(Love & Lust)

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You get butterflies when you see him, your heart pounds if he calls, and kissing him literally causes goose bumps. With chemistry this amazing, you'd figure you're destined to be together.

As it tunas out, not necessarily. "We often mistake a strong physical connection as a sign that two people are meant for each other," says Paul Dobransky, MD, founder of womens happiness.com. Yes, chemistry is key to a lasting bond, but it isn't the final word. Other factors should be considered too, and they take some sussing out. New findings describe the characteristics in a guy that actually predict relationship success, some of which you may be overlooking.

He Knows What He Wants

Any guy you're serious about should be able to articulate his long-term goals and passions (sorry, fantasy football and Xbox don't count). He can't ally himself with you until he has a sense of how he envisions his life in the future...and how you fit in. "If a man has no idea what he wants to be when he 'grows up,' then it will be impossible for him to commit to you," says Dobransky.

Don't assume he'll work things out, because when he does, you may realize his ambitions don't mesh with yours. "This mistake has contributed to the starter-marriage phenomenon, in which couples in their 20s and 30s suddenly realize they're going in different directions and divorce at an early age," says Dobransky. "It's preventable as long as you're both clear about your plans."

He has a Sunny Outlook