Who is in a relationship?

I have wanted to do it for a long time, and last weekend I “did it”. I told my sister about my feelings and asked her to be my partner. I drove my car through the night to her town and talked to her. It was a relief when i told her everything and I don’t regret it. I never felt so light. She is coming over this weekend so we could get to know each other better. I am very happy. <br>How many people are in a relationship and how did you tell your sibling about it?