Getting into one Pops. Women just want to be friends, see him as a 'brother' figure (which kind of means 'asexual' right?). He is simply just shy and massively uncomfortable of putting himself out there.
As an example re confidence and exuding a lil bit of sexy... once a year him and I go on his annual clothes shop which he finds the most painful experience ever, it is to be endured breifly rather than enjoyed... He will always, year after year, pick largely the same things in the same colours (navy, brown & green, maybe grey but not too light) and there will be trousers (not too tight...), shirts (not too colourful), shoos (comfy loafers... brown...)... I picked out a simple black poloneck once and he recoiled in horror saying "it's a bit too trendy for me"... I swear, if he could make himself disappear he would!
I think he's really scared to let his hair down, I have never seen him drunk in all the years I have known him and he hates being around drunk people. I have never seen him dance and doubt I ever will.
He's a diamond of solidity and friendship (my longest ever friend) and he'd make someone a great hubby, and I think once he'd found someone he trusted there is a naughty side that could be discovered... but his problem is he just can't show it and women just see him as "just a friend"...