I have been BF my son for almost 7 months now. ...

I have been BF my son for almost 7 months now. I am confused about what to do....keep at it or switch to formula. I dont want to sound selfish....(i feel it!)...but he wakes 2 - 3 times a night still...even on solids. He isnt really interested in feeding boob during to day but seems to want it more at night. I have tried increasing solids and milk feeds during day with no luck. I tried a dream feed of formula which worked for a few days....but then no luck. He now prety much refuses to take a bottle anyway. Everyday i am tempted to go and buy formula but im torn between giving him the best i can offer or making him sleep better!! PLease help me!!