2 1/2 yrs in live in relationship - my partner wants out - should I convince him otherwise?

After 2 1/2 years in a defacto relationship my partner wants out. He is 10 years older than me and says he can't handle my 10 year old daughter, and that I haven't let him form a bond with her. He also says I haven't adapted to relationship life, always dwelling on my past 8 years on my own. I love this man, and have asked him to reconsider, but he appears to be adamant. I am hoping once I am gone he realises just what he is missing - me as his partner? I am struggling with this realisation that he know longer wants me in his life?