Your choice really is either you get married in the Philippines then get a visa or you get married in the UK. I would say the first is easier, cheaper and you are more likely to get a visa if you're already married. There are plenty on here that have done both routes recently so can advise better than I, as we married in the Philippines in 2009 and I understand things have changed a bit since then.

Your b/f will need to prove his income is above the threshold (might be £18,600) as your sponsor when it comes to the visa.

Good luck!