i am sorry you are going thru this. set your boundries & what ever they are stick to them. you addict is going to be in your house untill you make him leave.they use people.he may leave long enough to go on a few days run but he will be back with the same excuses. he is not your responsibily. you are the only person u are responsible for. it is up to you how long he will be there. it is your house if you do not want him there. there are other places for him to go. maybe a homeless shelter,salvation army, his parents,anywhere but with you if he does not want to stop using & if he does there is a rehab.prayers for u both,