First, meditate for a bit on the New King James Version translation of Psalm 100, linked above.
This is as simple as it gets, a count-your-blessings exercise. Make a list of all the people who love you. Remember, love in the Bible comes in many forms. The undeserved love poured out on us by God, the love of a spouse, the love within family, the love that flows through friendship, and the love we feel in community, like in a church, all count.
That’s it. Whether your list is long or short, remember you are loved.