When you're really much in love with someone who never talks to you, never notices you it hurts and breaks your heart. You're crying, suffering and wondering what's so bad in you that he/she can't like you. It feels like you'll never feel better. You can be fine a while but in sometime the wounds in your heart start to bleed and you feel that awful pain again.
When you're not actually in love but you like someone a lot it makes you smile and feel warm. You feel so good and happy. :)
Those are my feelings about love. I can't know what it's like to be in love with someone also loves you 'cause I've never had that kind of experience but I can imagine it's maybe the best feeling in the whole world...?