A man has been slammed by Facebook users after he revealed that he wanted to ask his girlfriend to lose weight.

The man, who chose to remain anonymous, made the admission on the popular Humans of New York Facebook page – a photography project featuring a number of portraits and interviews collected in the streets of NYC.

In the post, he explained how his girlfriend's weight had bothered him since the beginning of their one-and-a-half year relationship, though he had hoped he would be able to “get past it.”

He went on to explain how he loves everything else about her, and doesn't want to end the relationship over that “one little reason.”

“It’s been 1.5 years. And I feel horrible, but I just can’t get past it. And I feel like a bad person for being bothered by it. I can’t bring myself to tell her,” he said.

“We’re going to couple’s therapy next week, but I still don’t think I’ll be able to say it. Is there any right way to ask someone to lose weight for you?”

Comments immediately began to flood in, with many users expressing their outrage at the man's comments. 

 "If you're concerned about her health, approach it from that angle. If you're concerned about her appearance, you should probably just stay single," one user wrote. 

Another said: "No. You are the one with the problem, not her. Do her a favour and end it." 

Speaking to The New York Post, couples counsellor, Rachel Sussman, gave her thought gave the issue: 

“When you see your partner change significantly, it may change the way you feel about them,” she said. 

“He might find [that he’s] attracted to someone else, that he has intimacy issues, that he loses attraction to his partners after a certain period of time — or he might be super immature.”

Other users were quick to jump to his defence, with one even describing his dilemma as a "natural issue." 

"He’s asking for your advice, not your validation to hurt his girlfriend, which is obviously the last thing he wants to do. So stop attacking him for dealing with the way he feels in a really reasonable and self-reflective way."

Either way, I think we can all agree that Facebook probably isn't the best platform to seek advice for such a sensitive issue and an open and honest conversation bewtwen the pair is what's really needed.