How do you know if what am feeling is love?

Because that person you think you love is the only person you think of, the only one you want to be with. You would do anything to stay with that person, you would do anything for that person. You wouldn't be able to live without that person. When someone even mentions that persons name you get a sense of warmth inside. If its love you will just know. If its love it will push through your entire body and leave you with this tingly feeling in your body whenever your with this person. I know the feeling. I hope this helped.