Should I be worried?

So my boyfriend and I have been together for a year and 8 months. We have been having sex with each other since 5 months of being together. Since about March of this year, when we were together for a year and 6 months, he tells me he doesn't want to have sex anymore, mainly because he doesn't want to risk having a baby. (I am 16 and he is 18) and he said he doesn't want to do it with a condom because he doesn't like the way it feels. Yes we've had sex after he told me this, but I had to practically beg him. Should I be worried about this? What do you think is going on? Any other girl experience this? I honestly feel like it has something to do with my body or just me in general and it makes me feel shitty... Please help.... 😞