Welcome to Pentax Forums, ouija.
Yeah, I know how it feels to become attached to a camera. It's frustrating when troubles arise...
It sounds like you've tried the obvious remedies. Have you asked Pentax about your problem? Here's a link to their service page:
Product Repair & Service - PENTAX Imaging USA
If your camera needs service, it would probably cost more to repair than replace.
I checked shareasale.com/r.cfm?b=889257&u=523490&m=66875&urllink=keh.com and they currently have a K 110D for what looks like a good price (
here). If you want a newer (used) body, KEH and the Pentax Forums Marketplace are the two places I'd look.
And if you're interested in a new camera, this is the right site for information. Scan the sub forums and you should find all you need to know to make an informed decision.
Good luck.