Help?

So I've been to China last summer (2013) again and made a good progress with my Mandarin (although still not even close to holding conversations). But since then I haven't learned a word, and of course forgot quite a lot. Now I'll go to China for a longer time, three months actually. I hope I can bring my Mandarin to a new level, which should be simple as it's quite low, but actually I'd like to improve more than one level.
To do so, I've booked a room with other Chinese people. I hope none of them can speak English and at least one of them will be patient enough to speak a little slower. As I didn't manage to learn by myself, or even via italki, I hope that this method will be more promising. I really don't know why I lost my motivation or better put "my drive" to continue learning.  I need to look for it, find it and establish it back in my heart.
Any advice? Thoughts?