To be frank, it all depends on how much effort you have put into it and your attitude towards language exchange. If you are really positive about language exchange, online study, you will definitely find out that it is truly useful. I don't recommend members sit there and wait for others to add them as friends. We can not just sit there and wait for friends to add us. Just take one step forward. AND click start to find your own friends, help those members with questions in Answers. You will see how rewarding those kinds of actions are.

Personally, I don't find it helpful enough for me to learn any languages, & frankly, I just use it to make friends, and wander around to kill time. Italki is actually a place where people talk about foreign languages, but there's an overflow of boring & rubbish topics which are good for nothing. & I believe that, everybody has to rely on his/her own efforts to fulfill his/her dream of being a bilingual, trilingual, or even multilingual speaker. & The best method is to get hold of some authoritative and reliable textbooks, dictionaries, & grammar books. It would be of little help to learn a foreign language only by practising oral English or slang words, of course, even if colloquial English is very useful, the basic skill for foreign languages is quite necessary, & I'm sure that you'll benefit from your steady level gradually.

This type of question gets asked from time-to-time. A similar one is here: http://www.italki.com/answers/question/22740.htm . I think you're making a false dichotomy between making friends and learning languages. Making friends is a big reason to learn a language. Also learning a language is a lot easier with friends-that's why we have language partners. In a lot of respects, they go hand-in-hand.

for learning for making firends god is a girl

因为要学语言，所以加了好友~~ 两全齐美嘛~~＾＾