Excessive precum leakage. Should i do?

Hello Sir, I am 27 year old guy. I am facing Excessive precum leakage problem. It has become so embarrassing for me to handle this. Earlier i used to do masturbation a lot. But now from last 1 year i have reduced it very much but still i am struggling with the same excessive precum leakage. Even a single seducing thought get it leaked that too in a excessive amount. Even whenever i am with my girlfriend i face this thing in a very high quantity. And due to this i have realized that it is also causing weight loss that too permanently. Please help me with the treatment. What should i do ? Within a year or two i will get married. And i am not very much confident about it. Many a times this excessive precum leakage causes burning sensation. And sometimes i also face this thing while urination. Please help. Looking forward to your reply. Thanks & Regards.