My boyfriend works out and runs a lot and lost over 150 pounds while I'm at home watching Netflix?

BudSmokahontas
So my boyfriend has been exercising lately. He was on the heavier side, but now he's pretty average. But I don't know if I should work out with him, since I'm more on the chubbier side. I just feel sort of weird that he wants to run, and I want to watch Netflix. Should I join him sometime to shed a few pounds? I don't want to seem lazy.
Updates
+1 y
I've decided to run with him twice a week. Still not running five miles yet.
My boyfriend works out and runs a lot and lost over 150 pounds while I'm at home watching Netflix?
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