I am 26 and my BF of almost a year and a half is 20 &...?

I have noticed my period to be a lot more painful since Gastric Byp 3 months ago. It sucks really bad!! I take like Tylenol Extra Strength. I can't do pills so, its a liquid. I comment on how I am hurting and stuff when I hang out with my boyfriend....Last night over the computer, he said: "Please don't tell me how bad you hurt, because I can't do anything about it." I thought that was pretty mean. Or is he just being brutally honest? What should I do now?