Experience in Learning English

I know English since primary school, at that time because I really liked the easy and funlessons in speaking English until junior high school because I still liked the talk with the English language I find it very cool.
But after high school English class in my opinion is getting hard and I became less interested in longer to learn English and even now I am less interested in studying.
indeed tricky, certainly there are various problems that arise in learning English, as well as with me who often find difficulties in learning English. It's hard to remember the words,new vocabulary that I have, it is often easy to disappear from my memory. maybe one of them is the power of concentration and memorization power.