A visitor visa will be almost impossible if shes not working and has no obvious reason to return to Philippines.
A fiancee Visa will be the best step forward if you're ready to make the commitment.
The process is realtively straightforward, but you will need a lot of paperwork to make it all happen.
Check out Petes site - http://www.british-filipino.com/
Be aware that the Visa application form has changed and make sure you download the right one from the British Embassy site (at work atm and can't spend too long digging around for it).
The main things you need are
proof of relationship - pictures, phone logs/ chat logs etc, copies of letters?
Finances in a good state - bank statements etc (not sure how unemployment might affect this)
Proof of accomodation and its suitability (mortgage statememnts / description of house?)
prrof of your own identity - birth certificate etc.
I think the submission we put in must have weighed 1.5KG plus! theres a LOT of paperwork to make sure everythings covered.
Make sure you write a good cover letter / letter of sponsorship as well. Theres some examples on the forum of you search.
Good luck
