Support!? Not so sure!

I just don't understand. I thought everything was going great. The family is all aboard with a healthier lifestyle. Well now it seems that the boyfriend is trying to "out do" me. He is drinking my protein shakes because I am not drinking them fast enough. He is taking my vitamins and supplements. He is even taking fluid pills to lose weight. He says he wants to "get healthier" for us. I think he is trying to lose weight so that he won't be the only fat one in the house. I can't even talk about how I am feeling with him anymore, especially if I am not feeling well. He will have something negative to say. He is in the mirror more than me! I see what they mean about relationships changing. true enough he has lost almost 40 lbs on his own but give me a break! I tell him I am so proud of him for the changes he has made but he drives me nuts weighing every time he breaks a sweat or goes to the bathroom. I already have enough on my plate trying to deal with finances. I don't want to have to stroke his ego every second of the day! I just needed to vent. I know I skipped a lot. I would be here all night. I am praying that this situation resolves itself.