I can write English but can't speak it. Can you suggest something to learn English?

As you can write, you can practice reading also. Try reading, at varying speeds. Change your intonation each time. Begin dramatizing your reading. You can create a habit of it, very shortly. You can practice speaking, in isolation also. At a later stage, you can go for interaction with others. But,

Dear K Kaur, learning English is only a matter of practice. If you really want to learn speaking, kindly develop a habit of reading in English as much as possible. Also try to converse with those who speak fluently good English. Most important of all start referring a dictionary, it is always an add