Right so i need everyone’s opinions and help in general.

Me and my partner have been together for just over 4 years now and we have a child together.

He doesnt do anything for our child. He has a child from a previous relationship who he does more for and spends more time with but he wont take our child out on his own, wont play with our child and only sees our child once a week ( we dont live with eachother) and when he does come round to see her he sits on his phone majority of the time and only stays for around 2 hours.

A couple of days ago he ended things with me. Then i saw he was liking loads of girls photos on facebook and tried saying it was an accident he didnt mean to like them .. ballshit! I dont have a clue if hes talking to any girls on facebook but i do have a gut feeling that he is but when i ask him he says no every time. When i try and sort things out between us he doesnt want to know. He either ignores, changes the subject or says he will talk to me tomorrow. All he is interested in is facebook now. (He deleted it for many years only recently got it back up and running again behind my back).

He said for us to get back together things have got to change bur he wont tell me what things? We simply only argue about him not treating me and our daughter right, only thing that needs to change is his behaviour towards me and his child!! He puts the blame on me all the time when i only express how i feel. Its like recently he isnt interested in me .. it feels like that anyway. Hes never made effort with me.. its been me fighting for us while hes just ignoring me because hes too busy on facebook. When we WAS together he never bothered with us anyway (he only broke up with me a few days ago) ... its always me calling and texting, if i dont then we wont talk! Sinse he broke up with me i have tried SO hard to amend things but hes just simply not bothered. I have a gut feeling that he wants a different girl IN GENERAL... when we was together we never go on date nights, never kisses me , never cuddles me.. only has sex with me and thats it. I say to him “i love you” and he doesnt say it back sinse he broke up with me. Im literally just fighting a losing battle over someone that clearly doesnt give 2 shits about me and obviously isn’t interested in me at all. I have now blocked him and he hasnt tried contacting me and he doesnt even care if we arent together. Hes never ever said i look nice. When we are out together he stares at other girls and says they are good looking ladys. Just so lost now. Someone who im so inlove with has just randomly walked away from me and never trys with me.