I won't kiss my boyfriend

Idk I want to. I think about it and all but I just won't do it. I'll blow it off. Like we do subtle kisses but I wanna KISS him. But I've had bad expierences with my ex, like him sticking his tongue way down MY throats and like.. No. And I was with him for 3 years so we just stopped kissing cause I couldn't stand it, so now it has me thinking CAN I EVEN KISS?