The fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control. Against such things there is no law.
A lot of different religious groups will give you all sorts of ways to know whether or not you have the Holy Spirit. Jesus has one simple answer: "by their fruit you will know them." Paul gives us the definition of holy fruit — LOVE, JOY, PEACE, PATIENCE, KINDNESS, GOODNESS, FAITHFULNESS, GENTLENESS, SELF-CONTROL. Now why not repeat them out loud and ask the Lord to make this fruit yours in full measure?
Abba Father, through the Spirit I call upon you. Please fulfill in me the character you possess. I want to exhibit the qualities of your child, Jesus, in whose name I pray. Amen.