Is it supposed to feel like this

So my boyfriend and I were making out and then he started kissing my neck and then it escalated and he pulled up my shirt and started sucking on my titties. But it kinda hurts. I like it when we’re making out and he plays with my nipples it makes me feel good. Or when he kisses around my boobs. But it hurts when he does it directly on my nipple. Any tips on how to make it less painful