He is bisexual. Why is she trying to convince him that he's gay? Talk about erasure. Whatever happened to "Trust people when they tell you their identity"? Oh right, I forgot, that only applies to gender identity. Sexual orientation is fake and transphobic.

When he caught up with me he told me my hips sway and “waddle”. He said “I just thought you should know so you’re aware and can try to walk more masculine.” Btw I’m very slim and do still have some curves which cause me a lot of dysphoria but my hips are all in all small.

For a woman maybe. But a woman's walk is still usually obvious, even on a slim woman. Source: slim woman with some mild body issues ("gender dysphoria" according to the castration fetishists) who's been bothered before by my own hips, lol. Being skinny doesn't mean you'll pass as a man.

edit: I think the title has a mistake, he's bi not straight. Unless I missed some of your sarcasm, Chunkee.