I'm 36, married with two kids aged 7 and 8, been with my wife since I was 21.

For the past few weeks, I've been sexually harassed by a co-worker; he's been asking me about things like oral sex, whether I'm obese, my preferred sexual position, color of my underwear etc.

He also said "I'd grab Scarlett Johansson by the pussy if I could, I want to see the dick of Justin Bieber, fuck youuuuu, my wife's a boring obese woman."

I've reported this to the boss every time; it's already recorded on security camera, since said co-worker does it in the car park (but a private part).

However, this co-worker has a wife and a now 8-year-old son, met them at the Christmas party a few years ago.

The boss isn't interested in taking any action, says "It's not for me to deal with, for fuck's sake, I'm trying to deal with buying another smaller company, jeez louise, I'm not going to investigate.". I reported it a year ago when my co-worker first started doing it, he said wait until I had more evidence, so I did

I've worked at this firm since April 2012, and things have been mostly good until this co-worker joined in November 2017; he's done this for a year.

This isn't joshing amongst bros, it's quite sickening.

The boss is doing nothing, my wife's noticing the stress; I told her about this, what should I do?

I don't really want to quit my job (I'm a sysadmin, the only one for my employer), as it'd be hard to find someone in the area (it's a medium-sized town) with my skills and experience; I've been into IT since I was 18.

Need some advice here.