It's that absurd yet extravagant feeling you get for someone. It's not necessarily build upon the fact that you knew that person for years, maybe you met recently and got to know each other and then got struck with that feeling. That feeling that you can't imagine your life without them in it. Can't spend a day without contacting them. That no matter how many times they hurt and mistreated you, you simply just can't get mad at them. Can't regret that you met them even though they are the reason behind your blues. A feeling that you can't avoid, it will forever chase you, no matter how many times you deny it; deep inside you know that you simply can't and don't want to get over them. And that's when you can be sure that you're ridiculously in-love.

When you eat dirt for the first time and leave your family to build a shack in the woods

having an unbreakable bond between two
people/sharing a deep connection,
a commitment made to another person in trust,
the total surrender of your heart to another
person with the security of knowing they will
treat it better than you will.

A deep feeling one holds for another, that has them going onto sites such as UrBanDictionary.com, looking up terms like "in love", and thinking about that special person within there heart the entire time while reading this. Now there smiling to themselves, curiously wondering how I knew that.

someone you want to share 23 huskies with

Being in love is like hearing a bear roar in the forest. You'll never have to ask yourself if you are in love, you simply know it. It is a feeling which is not easily revoked. Sometimes you may not want it, sometimes it may be too impractical, but it will always be the most overwhelming experience you ever have. To be apart from this person is to experience a high degree of agony. To be with this person, the highest degree of bliss. If you have not experienced love, you have not lived.

when you always think/dream about someone and all you want to do is be with him/her and make them happy.