"This has obviously been hurtful for me. I had a bit of a cry late yesterday at the end of the day," Sydney MP Alex Greenwich told reporters on Friday.
"After being in this gig for a decade and getting re-elected, I didn't think I'd still be subjected to homophobic abuse."
Since posting the tweet on Thursday morning, Mr Latham has been widely condemned including by federal One Nation leader Pauline Hanson and commentators Andrew Bolt and Ray Hadley.
The tweet was in response to a news article about a violent protest outside a church where Mr Latham spoke during the election campaign.
In the article, Mr Greenwich branded him a "disgusting human being" who posed a risk to the state.
"Disgusting?" Mr Latham wrote before making a graphic and homophobic description of sex acts.
Mr Greenwich said he did not want to waste his time getting involved in the now-deleted Twitter post.
"I have not heard from Mr Latham; I do not expect to hear from him. I do not expect an apology," he said.
However, he expressed concern that no one had heard from the upper house MP for 24 hours and "at a very human level, I hope he's okay."
"These are not the comments of a well person."
Last year, a review of the culture at the NSW parliament found people with diverse backgrounds and sexualities were more likely to be bullied and harassed.
Mr Greenwich, the only openly gay lower house MP, said more work needed to be done in the parliament's upcoming term, but would not call on him to resign.
"I don't want to give him another soapbox for him to pretend to be a victim when he seeks to victimise people."
All sides of politics had come to the Sydney MP's aid since the tweet was posted on Thursday morning, including Premier Chris Minns who "really wanted to check on my well-being," Mr Greenwich said.
"I used the conversation to talk to him about the work we need to do together to support the LGBTQI community, to make sure we're passing laws that support the LGBTQI community," he said.
Mr Greenwich has prepared an omnibus LGBTQI bill he intends to introduce during this term of parliament, which would remove discrimination from all areas of government.
Mr Minns, who is expected to directly address Mr Latham's tweet later on Friday, told a party room meeting that politics in NSW should not descend into personal insults no matter how much people disagreed.
He encouraged Labor MPs to continue with the respect and civility that characterised the state election campaign and approach every debate and conversation with respect.
"There's no need to have a race to the bottom and have personal insults. We don't need to do that in NSW politics," Mr Minns said.
Senator Hanson joined the criticism of Mr Latham on Thursday evening and said she'd had no response to calls and a text asking him to issue a public apology.
Her office on Friday morning declined to say whether Mr Latham had since replied, saying any further response was "up to Mark Latham".
"I want you to know I don't condone (Mr Latham's words) and neither do my members of parliament or party associates," Senator Hanson told supporters on Thursday night.
Mr Greenwich dismissed Senator Hanson's intervention as "empty words", pointing to her recent motion in the Senate which "targeted the trans community".
Mr Latham joined One Nation in 2018. He was voted in again to the upper house in the NSW election on Saturday, giving the party three MPs in the 42-seat chamber.
AAP has contacted Mr Latham for comment.
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