I need to leave but I can't....

I have been with my partner for 6 years and have a 4 year old daughter together.... here is just a few things that has happened in them 6 years..

. cheated on me with my cousin for 8 weeks just after 3 months of being together.

.text another girl looking to meet up

drinks nearly every day

.took drugs

makes secret Facebook to talk to other girls

.controls me to extent I feel I need to ask premison to go out.

.shouts a lot and be little me

.hit me once

. tried to kill himself when I broke up with him twice.

text his ex the day I give birth sayin he missed her.

. has went to another womens house for "drinks" on fathers day.

has put a add on Internet looking sex

so much more has happened.

I really feel like I need to leave I want to leave but it ain't that simple I can't even go when he is at work for he don't work... its so hard to leave someone that controls u so much... any girls from northern Ireland please that can help me ... I am struggling badly