Losing your faith in love closes you off to someone who might truly love you.
If you have experienced a bad breakup, toxic relationship, & had an unhappy childhood then you are carrying a lot of emotional pain.
You may have been rejecting great prospects just because they didn't match your high standards.
When you don't love yourself you tend to lose yourself in your partner. You tend to depend for love from your partner and become very insecure.
Are you afraid what would happen if you find the one? A fear of feeling happy can make you push people away before they develop close connection with you.