My friends tell me I have no social skills

I (24 m) don't really know how this came about tbh, it started off as a running joke about me having autism because of the type of job I do (software dev) but now they genuinely tell me that i am socially inept.

It just happened in our groupchat and i stuck up for myself and just said 'Its only you guys that think this'

The thing is, it literally is only them that think it - I can chat and have a convo with anyone. Whenever I am in the gym, ill talk to people i knew from school or if im out and see someone, i can stand and have a proper good catchup. I can literally talk to anyone willing to have a convo back. My dating life is good too, I have always been able to get a second and third date with every person ive dated.

I have so many people tell me that i come across very confident, so i find it weird when they say this stuff.

I honestly think my friends have started to become either subconsciously or outright jealous of me. I'm miles ahead of them in life (ive got a property valued at £240k, im earning the most out of them £50k) and so theyve been putting me down to feel better?

I recently got broken up with (3 months ago) and maybe they're thinking i should be over it but stuff like this does get to me sometimes.