Help Sex Drive

So me and my fwb have been “together” for almost 2 years now. My sex drive used be very high. I could get turned on easily and enjoyed sex. Now I seem not to care if we have sex or not. When we do I’m very awkward (didn’t used to be this way) and it’s just like no connection??? I had gotten a toy and used it frequently. I don’t think I’ve touched it in 6 months! I had a job that stressed me out and I gained 20lbs, he doesn’t care about the weight. I have a new job now with little to no stress. I thought it was the stress that caused it. I’m not sure what’s caused my sex drive to decrease and how to get the damn thing back!!! Please help with some tips!!!