I have refuses ypur application for a visit because I am not satisfied that you meet the requirements of paragraph v4.2 of appendixV: Immigration Rules for Visitors because
You have applied for a visa in order to visit Khanittha Phaovhanthuek who is a Thai national and you state in a friend. You Have never travelled out of Thailand Before and plan a visit of 2 months duration, You hace not Provided any documents demonstrating your sponsor’s UK immigration status pr personal circumstances in the UK, You have previously met. I am therefore not satisfied you are friends as you state.