What should i do!! i don't want to ruin his life!!!?

I was in bangladesh where all of my relatives live. they haven't seen me in a long time. i found out later that my 14 year old cousin fancied me. he always teased me and stuff but i could he liked me and he also asked me if he could kiss me. im 13 so its not that bad but he is my cousin and i have no love for him in a boyfriend girlfriend way. also my 17 year old cousin DID KISS ME and well being me i slapped him and he was very angry. i left 2 weeks after no one knowing anything but now i feel so guilty. i cant stop thinking about it and i don't know what to do. they are my cousins, my relatives i cant even think about loving them and plus im only 13 i don't want to be in a relation. they are in bangladesh but im going to go there in the summer and i really need some advice of what i should do when i get there. do i ignore them or talk to them?? help me please!!