OP, I'm going to say that I don't think your being unreasonable. You sound genuinely emotionally neglected and, if you've tried counselling and your partner isn't responding, you can hold your hand up and say "I tried".
The biggest difference is, back then, I tried ALL the time to make that side of it work. I was so much more into him in that way, than he was with me. I now think it's just the way he is, I don't think it's me. Over the years, it wears you down. I gave up trying and that's when it started getting worse.
That echoes my own experience, weirdly enough. My partner cheated on me, but only after I realised I'd been overcompensating for years and was at the point I had to say "enough". If she had a bad day I would have to lay on TLC, but if I had one I had to suck it up in case it brought her down too. Looking back there was a real imbalance. Its no wonder we broke up in the end.
That said, I have to respectfully disagree (partly) with @pointythings about this:
All this stuff about vows is just a way of beating people (mostly women) over the head with this 'you have made your bed, now you must lie in it'. It's telling women that they must always put themselves second.
I'm not sure that's being entirely fair. Life is hard. Raising kids is hard. Old age is hard. It's, quite frankly, incredibly unrealistic, to expect relationships to chunter on happily, with the same passion as ever, through all these. Vows are taken by men too. They're meant to stop them from running off with girls half their age when those hard bits occur - usually when they hit middle age. The fact it doesn't stop many of them doesn't suggest women should emulate that shitty behaviour. Or should we start mugging people because some men do that too?