Sad about losing my virginity?

I lost my virginity to my good friend about two months ago. At first I was relieved because I’m 20 and felt like I was late on losing it but now I feel bad. I tried to tell myself it wasn’t a big deal but I still feel like I gave my virginity to somebody that doesn’t love me and I won’t be with them for a long time. We’ve continued to have sex and it’s great but I always end up feeling sad about it. Every time he leaves my place I feel sort of dirty and used, and like I’m not quite the same girl. Has anyone else experienced this?