People are focussing on OP's eating disorder, and missing (or ignoring) the red flags.
He didn't suggest lunges and squats because he's concerned about her health, FFS! Who the fuck would suggest that form of exercise to somebody in OP's position?
If you were going to suggest exercise, you'd suggest gentle walks, swimming, maybe some yoga. not miles long hikes, lunges and squats, and it would be in the context of a conversation about OP's health.
He comments on her eyebrows, when she hasn't had them shaped and tinted.
He said he likes the fact that she hardly eats. That alone is is a MASSIVE red flag. Why are people ignoring this? No wonder so many women end up years down the line in abusive relationships, if they don't know what's a red flag.
OP said she's posted about him on here before, and people told her she was being gaslighted, yet now, because people are focussing on the ED, the boyfriend has done nothing wrong, and any comments he makes are because he cares, and OP is seeing everything as a criticism, because of her disordered thinking.
OP, I'm concerned that earlier, you said you were going to pull back from this relationship, and end it, yet now you say you're not going to LTB over this. Do you mean you're now not LTB, or you are, but because of the accumulation of red flags, not just because of this single issue?
You should LTB, because after only 5 months, you've started 2 threads about him, and there are several red flags in this thread alone (I don't know if I saw your previous thread) which indicate that you should drop him.