Should i leave him? i dont know if i love him like i used to and i dont think he'll ever make me truly happy?

ive been with my bf for over 2 yrs. he has 2 kids to 2 difrent women he no longer speaks to. he doesnt get to see the kids. he has no job, he smokes, drinks, used to do drugs, has no car, has no money and is always gettin into fights. we've broke up a lot bt we do love each other and have never broke up for longer than a few weeks. i cnt move on when we break up bt mostly its bcos he always contacts me n i end up goin bk to him. i have been reli happy in the past at times when we broke up and i do better without him, its just that i always fall for him and i dont feel strong enough to move on. its my longest relationship. im at uni and have a part time job. im also livin in a flat wit uni mates - he lives with his mum. i have a car and more money than him even tho im 4 yrs younger than him. he comes down to stay at mine and it gets borin cos we cant afford to do much - i cant afford to pay for both of us. i do love him but he seems like he will never get a job or move forward in life - hes stuck in a rut and i want a bf i can respect and look up to. i want more tbh, i feel like he cant give me anymore. i dont love him the way i used to cos so much has hapend and im tired of it all. should i give up on him even tho i love him? it feels like we're goin nowhere and i no i cud meet someone who could make me happy. he has been nasty in the past too, all my mates n family tell me to get rid of him and even his own mates have said the same. we no we have problems bt we cnt break up cos wen we do we get bk together r miss each other 2 much. ino its silly, and i cud have moved on ages ago bt he wont let me - he has nothin else to distract him or to motivate him cos he doesnt work or do nethin apart from drink/watch tv. what should i do?