Ask HN - Ever feel useless? How to get over it?

If the topic is irrelevant, then feel free to downvote, I'll delete it.

I've been feeling pretty useless, for a few months now. I have a job that I like and good in, I help my company make money, I don't leach from society etc etc. But deep down, I know I am probably not adding much value to the society (except helping some corp make money, which I'm not sure is anything to be proud of). There is absolutely no meaning in the work I do, and office gossip just depresses me a bit too much. I can't leave that easily (visa status, family situation etc etc). I'm ashamed to say that thoughts of suicide have crossed my head a few times. I do some volunteering work, give money to charity etc, but all of those seem to be very small, insignificant, just 'feel good' stuff.

Anyone in similar situations got over it? Any advice?