Rejected close friend

One of my closest friends asked me to be his valentine but I don’t want to give him false hope and really don’t see him that way or want to ruin the friendship so I rejected him by saying that I didn’t want to ruin the friendship and now I feel really bad. I’m sure most of you have gone through this but now I’m scared that the friendship is ruined because I rejected him. Is it normal to feel bad? How did your situation turn out if you’ve gone through this :/