For some folks, erotic touching is a form of intimacy. If the relationship is operating without any or with very little relational intimacy, then it's not very much different from having an acquaintance reaching for your personal parts.
If you had something better in the past (and I know from your descriptions here that you did), then something has changed for your wife that results in her not wanting to be touched intimately by you. It very well could be the birth of children, hormones amuck and thyroid difficulties. But you know, none of those explains the pissed attitude towards you.
Somewhere along the line, Cemar, it appears she has grown to dislike you. To disrespect you.
Have you ever asked her if she would want her son's to eventually have wives who avoided their touch? Have you ever told her that you miss kissing? That you miss snuggling on the couch? Have you ever told her how crushed you are when she cringes from your touch?
She needs to know. Right now she is probably wrapped up in her own version of your marriage - and it doesn't include you in the way you want to be included. I think you need to stop quietly being hurt and saying "I'm fine" when she asks what's wrong.
