How do you know you love them?

When i met pat she was working brams. We talked and for some reason i started strokeing her hair. I was puzzled  i actually looked at my hand why my hand did something with  me not evan thought it . We became friends i loved to ice skating so much i spent over 300hundred dollars. She wanted to learn how to ice skate . We were friends i had no intention of  sex or kissing. She was a good cook and she wanted me to stay over her place. She said she was lonely. I evan prayed with her with falling asleep. We were friends and i had no idea we had any realation except friends. When do yo know when you love them?