Finding the right guy is no walk in the park. You’ll inevitably have to go through a couple of bad apples before you find someone who fits you like a glove. Call it the Goldilocks principle on relationships: Nope—too hot, too cold, too tall, too short! We get it. You want to find someone who's just right.

Online dating sites help to a certain extent by pairing you up with someone you're likely to be compatible with—The Huffington Post reports that 10 million American couples met online in 2010—but ultimately, you’re the only who can really determine whether you’ve found the one. In fact, a study published in the journal Science shows that newlyweds’ gut feelings about their relationship may predict their overall happiness in the long run.

Lead author James K. McNulty says, "Although they may be largely unwilling or unable to verbalize them, people’s automatic evaluations of their partners predict one of the most important outcomes of their lives—the trajectory of their marital satisfaction."

But gut feel aside, is there another way to determine if you’ve found the one? We think this list may help.

1. He follows through.
When he tells you that he’s going to call you later, he does. When he messages you to make dinner plans, he doesn’t cancel at the last minute. According to communication and relationship expert Dr. Pat Allen, this is a definite sign of trustworthiness—an indication that he’s a keeper!

2. He introduces you to the key people in his life.
Whether this means his family, his friends, or as one writer on Oprah.com put it, his burrito man, it’s a relatively big step. It goes to show that he’s already considering making you a permanent fixture in his life. "Because you are his girlfriend and he wants the key players in his day-to-day—who are usually not his mother, grandmother or first-grade teacher, all of whom you will meet later—to know."

3. You prioritize the relationship.
When you weigh your options based on how they may affect your relationship's future and not just your own, you may already be consciously or unconsciously recognizing your partner as Mr. Right. According to The Huffington Post, this kind of commitment is a strong predictor of marital success. In other words, it’s no longer "me" but "we."

4. You are willing to compromise.
Not because you're forced to or because you want to avoid conflict, but because you genuinely want to. There's a thin line between the two. One leads to a life of concealed resentment, while the other leads to a fulfilling and loving relationship. With the right guy, you'll almost always be feeling the latter.

5. There is little to no drama in the relationship.
No relationship is perfect—even the most well-matched couples fight from time to time—but when these disagreements are minimal and handled productively, it's a sign that you're on the right path.

SCREENCAP: Something Borrowed/Pioneer Films (2011)