I have a 7 month old with no routine, co-sleeping, settles only on the - will he learn to settle himself?

First of all take a deep breath and realise you are doing a great job! I was in your shoes 6 months ago. I fed my daughter on demand for the first 12 months of her life and she slept for two 20 minute sessions during the day and would wake several times during the night. By on 'demand' I would feed her at least every 2-3 hours. Initially I was concerned that she was feeding too often but eventually I realised that this was what she needed and if I took it away from her she would become very distressed. I would get tired as I felt I had her permanently attached to the but at least it gave me time to sit on the lounge and watch some tv! Anyway dont listen to what seems to be the normal routine way of bringing up your baby, just listen to you gut and between you and your baby, you will decide what is best. I weened her at 14 months by going cold turkey where I didnt offer the for three days and she was fine with it. I think she realised she was ready for a change also. My main advice to you is to keep feeding him when he wants it and not to worry about his sleep as that will come later. My daughter started sleeping through the night at eleven months, and started sleeping more through the day at around the same time. After I stopped feeding ,we settle her by gently rocking and patting her bottom in a darkened room. Works a treat