But when I was thinner, I was treated like a piece of meat far too often. Even dressed conservatively, some guys had a hard time keeping their hands to themselves. Even in professional settings, too many guys would either try to take non-professional liberties, or waste my time trying to sound like they had legitimate professional reasons for taking up quantities of time that I would not have spent on personal matters - only later to find out that they were just talking me up to try to get me to go out with them. Also, a lot more people seemed to feel they had the right to critique my figure (I was actually called too fat and too thin by different people in the same day - and I didn't ask for EITHER of their opinions!), my hair, and my clothing choice than they do now.
Being heavy does not eliminate shallow behavior - now various guys seem to think that they don't have to keep their word with me, or treat me with respect, and rather than the degrading whistles, I get rude comments by strangers passing by - although it is less frequent than the unsolicited critiques that I got when I was a reasonable size.
I know that for my physical health I need to lose weight, but what about my mental health? Which devil is more tolerable?


to you! You need to get healthy (which will include the side benefit of losing weight) for YOU. Not because of how others may or may not react. When we are physically healthy it is easier to be in a good mental state. 

To be honest here, im not sure how to help you. I have used my fat as a defense for a long time, before i decided enough was enough, and that it was time to face my issues with self worth and get on with having a nice life with a healthy mind and body. I really think you need to decide for yourself, and that no one else can persuade you to do it. Weight loss is hard, you need determination. Im not saying that you cant do it by any means at all! I just dont know how i could get through it if i didnt know that it was absolutely something i wanted badly. You mentioned that you are a counsellor, have you thought about seeing one yourself? It might be nice to just talk over all your concerns with someone 

I like this - thanks.