John Steinbeck's poignant 1958 letter to his teenage son about love answers so many questions. It's quite possibly the wisest thing ever written and might make you cry.
New York
November 10, 1958
Dear Thom:
We had your letter this morning. I will answer it from my point of view and of course Elaine will from hers.
First — if you are in love — that's a good thing — that's about the best thing that can happen to anyone. Don't let anyone make it small or light to you.
Second — There are several kinds of love. One is a selfish, mean, grasping, egotistical thing which uses love for self-importance. This is the ugly and crippling kind. The other is an outpouring of everything good in you — of kindness and consideration and respect — not only the social respect of manners but the greater respect which is recognition of another person as unique and valuable. The first kind can make you sick and small and weak but the second can release in you strength, and courage and goodness and even wisdom you didn't know you had.
You say this is not puppy love. If you feel so deeply — of course it isn't puppy love.