If you are ever in a situation where a sweet and nice person who you know can actually treat you better with love and care confess to you, but you just can't find any feelings or sigh of affection for that person?, and then suddenly when you Reject that person you just start feeling guilty of rejecting him/her, and you bury that guikt in you, you can't sleep, can't eat properly, and can't stop thinking most likely overthinking about that person, and on how guilty you are for rejecting him/her even though he/she is so sweet, loving, caring, honest, and such a gentlemen/ gentlewoman l.
Well don't be guilty, why?, because it's not exactly your fault that you can't feel any affection for that person, it's not your fault that you can't bring yourself to like that person, it's not your fault that he /she liked you, nothing is your fault, so there is no reason for any guikt to be there at all, I know it might sound harsh, but just think about it
You can't just force yourself to love and reciprocate someone's feelings even though you don't really like/love or feel anything about that person, and if you do, you're just making a fool out of yourself, you're just forcing and torturing yourself, you can't force yourself to love someone you don't really even love, you can't just force yourself to show affection to someone you don't have any affectionate feelings for, just because you feel bad, or guilty if you Reject them
It's your choice, you're the one who gets to make it, and if your choice is to reject him, then go reject him, stand up for yourself, you can't build feelings of affection that doesn't exist, you can't force yourself to love someone, and if that person really does love you, and is really a sweet, loving, caring kind of person then they will understand your side, and your feelings, they will understand what you mean, and that you don't like them
All you need to do is reject them with respect, reject them in a good and polite way, and if they don't get why you don't like them even though they are sweet, caring, and loving to you, then they are really just not the one, it they really love you they would and will understand
Don't go around burying a guilt that shouldn't even be there.