Hi, I am a Brhmin boy. I love a girl who is hindu but non-Brahmin.
My family is strictly against it as they want a khatri girl to be my spouse. I had try a lot to convince them but they are rock solid with their decision. They left no choice for me. I don't leave her so only alternate is to ran away which I don't want. Please suggest I am in such a dilema

How does the girl and her family feel?? If her family does not agree, and she cannot marry you without permission, and is unwilling to run away with you, then forget getting married.