My best friend told me he is in love with me. Now what do we do?

My dad and his dad have been best friends since they were in kindergarten. As a result, we’ve grown up together. We live on the same street. We’ve been best friends since we were born. We had to be lol. We didn’t have much of a choice since we were always together. He is my best friend and I obviously like him. But last night, I was over at his house and we were hanging out in his room like normal. And he eventually told me he needed to tell me something. He told me he has feelings for me and has since he could remember. He didn’t want to tell me because he didn’t want things to get weird but he couldn’t keep it hidden anymore.

It was really unexpected for me. I left to think about it and I just sort of feel sad and I don’t know why. Why would I be feeling this way? I don’t know. I’m a little embarrassed to be honest. I don’t want to live some sort of cliche. And we’ve been teased by our parents about this our whole lives. They’ve always joked that we’d get married someday. I like him too but I have repressed it because of this. I don’t want people to think we like one another because we’ve been forced to be together. I know it’s stupid to care about that, but it makes me question it myself. I don’t know what to do or how to feel. I just needed to process my thoughts.