Red2Blue firstly a Tourist visa is what it is for visiting, the other option may be a Fiancee visa, so you and your partner need to decide, if you decide on a Tourist Visa then thats all that you can do, and you have to return back to the Phillippines at the end of your stay, you cannot extend it, get married or anything else.
With a fiancee Visa you can still Tour around or do whatever you want, you can even get married and then stay here in the Uk, but if you both decide you dont want to get married this time around you return back to the Philippines, and make your plans for the future.

Im sure other Forumites who know more about these things than me, will come and offer advice to you, but as someone else has suggested, it would be wise if your partner joined the forum.