Am I a bad person?

So I just got out of a three year relationship just barely two months ago and I started talking to someone last month. He's sweet, caring, funny and absolutely adorable! I was so happy to have him, a bit scared and put off because it was soon but I didn't mind because I thought we could make it work... but then we had sex the other night... and he had no clue what to do (he isn't a virgin) and his penis was so skinny that I hardly felt it in me! Ever since, he's asked me to have sex every single day but I come up with excuses because I'm so turned off. Today I told him that I can't be with him because I'm not ready for anything new yet, which is true, but not the whole story. Am I a bad person for leaving because of that? I just feel like being sexually attracted to your partner plays a big role in the relationship and I am not at all now.