I feel guilty

So me and my boyfriend are really close, he’s like my best friend as well as my lover. The other night we were talking about how many people we’d been with before etc. He’s 18 and I’m 20. We’ve been together for a year. He’s totally fine and understanding with how many guys I’ve been with (too many) 😢 but when he said he’s only been with one person other than me one time. I just feel really guilty because my number is so high in comparison to his. I feel super bad and I don’t know why. I love him to bits and I know he loves me to bits. I wish I didn’t feel bad but I do, it’s as if I feel he is too good for me type of thing, so pure and then theirs me..