Hey alex, stress is probably the number one libido-killer in the world. There's nothing like stress to destroy a couple's sex life. (Just ask first-time parents.) Stress floods our bodies with adrenaline and cortisol, and that combination inhibits sexual arousal. It makes sense from an evolutionary point of view (times of stress would not be the best time to spend resources on a pregnancy and a new baby), but we're pretty far removed from our evolutionary environment, aren't we?
The thing is, if his stress is affecting his libido, all the horny advances in the world aren't going to help. In fact, they may just add to his stress. I'm betting he's wondering what the fuck happened to his sex drive and why your advances aren't working - and I'm betting that's leaving him feeling pretty confused and worried.
My guess is that the best way to bring your sex life back is to work on managing stress better and reducing it where possible. Chronic stress isn't good, anyway. It has all kinds of health and mental health implications. And if you as a couple can learn to weather stress early on in your relationship, it'll benefit you enormously in the long-run.
Also, you're six months in to your relationship. This is prime time for a couple's sex life to diminish a bit in terms of frequency, anyway. Don't stress out too much over it
