One tip that I can suggest is to be OC with your docs preparation. I applied for UK visitor visa in Manila and got refused the first time, I was too confident that I have been in the US so I took for granted giving them screenshots of me and my bf's conversations and photos. I have moved in Egypt due to work and after 2 months of working here, I then again re-applied and this time I was granted with a multi-entry visa and it's about to expire this August and been to UK 5 times already in 6 months duration. It'll need a lot of money and hard work prepping the docs. I gave them pages and pages of screenshots of emails, texts, skype conversations, his flight bookings to visit me, a 5 inch thick photo album with captions on it, and also yes you need to prove that you will come back and not extend your stay in the UK (letter from your employer-if working, bank statements, land titles etc). Good luck!!