I NEED SOME HELP

Im 25 weeks pregnant, full time job, a mom to a 2 year old and a 4 year old that is autistic, and im going to school to further my education. I really try in my relationship with my boyfriend of 6 years but on multiple occasions he has called me boring and im not enough sexually. Im afraid once again that im going to be left heart broken and on my own. Ive asked if im so boring why are you still with me, he says its because he loves me. I feel like hes just gotten comfortable and he doesn't leave becauseof that reason. Im so stressed out. Im trying to be okay. We had an open and honest agreement about him watching porn when he needed to when i was not in the mood. But hes not up front with me or honest about it. He tells me we are okay when we are not okay. Im starting to believe if hes not cheating now will it come to that point. Am I over thinking this and being over emotional?