Everyone say that you shouldn't touch your face because you have dirt on them which will cause the pores to clogg but I honestly don't think it will make a dramatically diffrent or worse if your boyfriend touches your face while he kisses you or something. Try to use a serum to reduse the redness and to calm it down. That worked for me.

only if boyfriend has really dirty hands

I heard before that kissing is actually good for acne from an internal point of view...just make sure everything is clean and hygienic and you should be fine.

If your boyfriend has facial hair, and does not clean it well it can make your acne worse, this has actually happened to my friend before. She never had acne, and the minute she started dating someone with facial hair she got acne around her chin and cheeks. Also if your boyfriend has dirt on his hands it can clog your pores so I would just be extra careful with that. Good luck!