My oh takes the mick..help

this is a long rant so be prepared...

had my gorgeous little boy in January (now 4 months old) and my oh was great at first, sending me to bed for a sleep when i was tired, running baths, watching finlay while i got away for an hour etc...but now he hardly ever helps out and goes out at least once or twice a week drinking.

understandably he works full time and deserves to chill out but i am at breaking point and really don't know what to do..

I look after Finlay all day every day while he works and get up with him during the night. My OH comes home and will either go out for a few pints, watch tv or play on his ps3..i settle fin every night, bath and put him to bed and basically he does nothing! i cant even remember the last time he did any of the night time routine! Then he does not even work a weekend but i hardly ever see him..he has another little boy from a previous relationship and it seems like he dumps the kids on me every weekend while he goes out for a few pints to chill out..where is my chill out time?

I went out for the first time in ages on friday with the girls and i still had to get up at 3 and 6 am to sort him out as my oh said he felt sick ( then he wolfed down two sausage sandwiches and loads of other crap that day) and he always uses that excuse. He got up with him at 5am this mornin only to come and dump him next to me on the bed at half 6 then turned over to go back to sleep..finlay clearly was not goin back to sleep and he kept tuttin cause he was makin noises so i ended gettin up at 7 (only went to bed at 2 once i d done everything) with him.

he promised me this weekend he would be with all of us all weekend, let me have a lie in and let me chill out for a bit as i am shattered! and surprise surprise he has went out at 4 said he be back by six and still not home..i am sick of it i may as well be doing it all on my sodden own.

he never does anything romantic for me, and hardly spends any time with me or finlay and it is driving me insane..am i being unreasonable?

he went on tuesday for a team meetin in a pub, said he d be back by 7, phones at 7 says he will come back at 9, then rings to say he wont be long..his battery dies on his phone supposedly and i am waitin for him to come in..by twelve when i cannot get through to him, i started to panic thinking something was wrong, rang round hospitals and ended up ringing the police as i did not have a clue where he was..he turns up at 2am full of drink (having gone out at 1pm) to me a total wreck and just swans in like everything is ok! I went ballistic (and this is not the first time he has done it) and he said i was selfish and just tryin to play the victim!

i feel like he does not listen..he told me to tap him on the shoulder when i wanted to talk to him and he would listen and do something about it..i do and he still does not listen..i am at the end of my tether and i really felt like just uping and leaving with finlay as it just does not seem like he cares at all and i m basically doing it all on my own anyway ( bar the financial side of it).

someone please help me i really do not know what to do..i love my oh to bits and he is a fantastic dad , we are getting married ina few years, just i want him to help me out more and stop actin like a 16yr old!

thanks for reading this
haylez xx