This fall-in-love phenomenon isn't just limited to reality. Every living creature, from orangutans to deep-sea animals, is similarly wired. When you're in a limited social environment (like small town, college camp, the mostly-female office) the adaptive trait is to choose someone, even if he doesn't meet your usual standards when you have more options. Why? May be because we're programmed to select from what is available to us.
So what is the secret to knowing if you're genuinely into a guy or being tricked by your heart. First, ask yourself if you're really feeling a connection to this person or are you trying to convince yourself that's he's right for you. Another trick, ask yourself if he's easy to be with. A good relationship should not be a struggle. You should be able to have fun together and be supportive of each other without feeling like it's hard for you.
There are cases when it's really hard to make both but you know yourself and if you feel you're getting attached to