It has the power to destroy you. It is a breach of loyalty. If you love someone long enough, they will love you back eventually. If after much frustration you decide to stop loving someone, you are a failure. The only alternative is loneliness.
Lack of love leads to despair.
You have to love your lover all the time, steadily. The way to get over your fear of love is to withdraw and not get involved. Sex without love is bad. People give you love. If you love someone you don't use them.