I get discouraged

How can I study English ? I've lived here almost 3 months. But my English isn't improving up to now. What should I do? Maybe I'm very silly, and not clever. Other people are studying much better than me. I guess. I can't memorize the new words. I think I just wasting my money here. I didn't miss my home. I just get discouraged. What a crappy day. Maybe I don't try to study English as much as possible.