Please write to my personal account. I think I can talk you through all the things you need to do. If you have photographic evidence of having met I agree you do not need a visit visa to Britain. However, if you have met please ignore advice given about applying for fiancee visa now. Too early. As fiancee visas run out after 6 months, your visa should not start until less than 6 months before your wedding as you also need time to apply for a spouse visa afterwards. It is correct that fiancee visas can take up to 3 to 4 months (all depending on how well you present your case) but we received ours after just 4 days without being given opportunity to state what date we wanted visa to commence from.
Also bear in mind that you need to be in Britain at least 1 month before you are allowed to marry anyway. It would be best to wait until you get your visa before making plans for your wedding. You can always change the date later. British Embassy just need to see evidence that you plan to get married ie a form from registry office will suffice