Spiddles, if you express just alittle out it will make your boobs abit softer and easier for Liam to attach, also the milk will have started flowing for him which takes out the hard work for him. I think that you will find, babies generally after they have tried drinking from a bottle as opposed to a breast they get lazy. Breast feeding is harder and more tiring on them however persistence will pay off. If you find that your milk flows too fast in your let down, try and lay back alittle and bring him to the boob not the other way around.
I have breast feed all my babies, the first 2 for 9 months and the last for 20 and trust me it is all trial and error. What works for one baby won't always work for the next. Let me know how it goes. HTL

Take care
Trish