Husband keeps changing his mind

Sian
Hi everyone 
Has anyone else had this problem? 
So I've been with my husband for 6 years I'm 28 and he's 33. I've been ready to try for a baby for years but have been waiting for him to catch up. Around xmas time he finally said he that we would start trying. But since then sometimes he's doing the deed properly but other times he pulls out?? (If u catch my drift) I don't understand ?? He says he forgets and that he's wants a baby but then other times doesn't want to talk about it and   He gets a bit awkward.. 
Any advice