For me, really, is you non-stop think about that person, you non-stop trying to get that person's attention, and you would have dreams about that person :)
When someone sees God through someone else, that is called true love. When you would sacrifice yourself to someone else you are in love.
When you know you would do anything for that person, and no matter what they did you would still be there for them unconditionally.
No, because I do not know you. It would be difficult to love anyone the way an angel would love someone.
If you love him or her and they don't know tell them and if they don't you back then it's their loss.
Well to loveing someone is not how you want to ask you'r question. This is how," Can falling in love make you love someone?" and my answer to that would be possibly, if you know what love means.
No I would not. That is not the correct way to go about a Breakup, or other relationship difficultys. Answer If you love someone you wouldn't hurt them whether they love you back or not.
how you know if your love is true to someone is that you follow your heart
That depends and only that particular individual would know that answer.
To be truly in love with someone, means that you know about them. You have spent time with them to get to know them. On the other hand, a crush is seeing someone you may think a cute or hot and would like to get to know them.
Your question is contradictory. "What if you love someone and she loves you back but she doesn't?" ...Clearly the answer would be that she doesn't really love you, and you know this, as you stated "but she doesn't."
It's not something you can go around asking a website. You have a feeling inside of you that says, "I cannot live without this person." You will know when you are in love. Also, once you really love someone, you never completely get over them.
You will have to find someone else to take interest in. I would know because I was just in that situation not to long ago.