I think love is a learned practiced behavior. I also think it can be very unpleasant at times. It requires dedication, devotion and commitment. I would say it is not a feeling but an action created by a feeling and a perspective.

I know one thing.Love is not selfish or self centered. It is altruistic by it's very nature.
This translates to whether it is about sexual love, brotherly love (friedship) or the love from a higher power.