From what you have said it sounds like you are at the end of the road now, tbh I would just end it instead of putting yourself through more misery x

bump

me and my dp been togeter for 4years and think its coming to the end,he never comes near me and is always out doing his dogs (lovers lamping and coursind working dogs)and never gives me time to my self or let me do things i wana do,everytime i plan togo out their is always a problem where i cant.iam vert lonely and i used to have so much confidence      we have a 2year girl and 4month old boy and a 9yer from old relationship , i do everything and not even a thanks he lies to me so much well little lies but its what he does and thinks i dont have aright to  say no,always out with his dog and mate,lieing about wheres hes going now i know he wanted cheat hes not like that i really do think hhe loves his dogs more than we,when i think about us i dont feel nothing but so scared to leave for my kids they love their dad sooo much,but ii have tryed everything talkibg to him,writing it down as sorts and nothing i do so much for him and nothing in return.what should i do,iam only 21 and feel like i have nothing left for him we been though so much pleaase help