Advice on boyfriend not wanting sex.

Shaylee • Mommy of two💕

So, I've been with my boyfriend for 7 months he's 28. The last two months we've hardly had sex, which isn't normal and that really bugs me. We have talked about it and he told me that we will get back on "schedule". The last two nights I've wanted to have sex he comes up with an excuse, like his back hurts or he's tired or he's got to much on his mind. etc..

Has anyone else been in a situation like this? And what did you do?