Give the relationship time. On his website, psychiatrist Fredric Neuman advises, "If you want to know how someone who proclaims love is likely to feel three months from now, you have to wait three months to find out." Some people may make genuine proclamations of love but not feel the same way even hours later, says Neuman. Time will tell if the feelings your guy expresses for you are the real thing or just a temporary infatuation.

A guy can say that he's really into you, but that may not be the case if you find yourself always doing the pursuing or making sacrifices, says physician and author Lissa Rankin in a September 2012 article in "Psychology Today." When you go out to eat, does he take your preferences into consideration? Try to discern what would happen if you stopped trying to make the relationship work, advises Rankin. If you believe your guy will hang around even if you don't bend over backwards trying to meet his needs, chances are his feelings are genuine.

Listen to the words the guy uses when he's talking. When he talks about the upcoming weekend, does he say, "I'm going to take you out to dinner," or "We should go out to dinner Saturday night"? Using pronouns such as "we" and "us" demonstrates that he thinks of you as a part of his life. Because he is unlikely to be consciously aware of subtle differences in his speech, observing how he talks is a good way to gauge his true feelings.

Sometimes your own feelings can tell you more than an analysis of someone else's behavior. Rankin recommends asking yourself how you feel when you're around the guy you like. If you're jittery or guarded, your subconscious may be picking up on something that your conscious mind has missed, such as subtle body language that sends a contradictory message to what your guy is proclaiming. Although you don't want to live by your emotions, paying attention to feelings can be a key to figuring out why you are uneasy or mistrustful in a relationship.