What’s in the best interest of the Child?

i’m conflicted, yet have been standing firm on my decision so far. My son’s (3yrs old) has two older brothers 9 & 7. Their father has had a history if introducing the other two children to new women and their kids (besides myself of 6 yrs). The other two boys have gotten attached to both the women and their kids and have heartbreak every time their father decides to take on a new woman and her kids. All while still with me and my son. recently i found out about another woman of whom he was attempting to “get” for the last year. every night eating dinner at her house and when i worked on the weekends, talking all three children over to eat and spend time. This included MY 3 yr old son. it’s been six months since i kicked him out. he’s since been seeing a recovering drug addict with 3 more kids and insists on having her and her kids around my son. I don’t want my son getting attached to both the woman and her kids, and then feel the heartbreak of them leaving his life for no known reason. My son’s older brother (9) has panic attacks and has been talking to the school counselor. He feels that daddy loves (Michelle) the new girl and her kids more than him. I do not want my son to feel the same way. Until i am sure he will be with her for a lengthy time and that she is stable (drug addiction) am I wrong for stipulating that my son is to NOT be around her and her kids. My son’s father refused to see ayden (my son) under my stipulations. i offered him to come down and see him at mcdonalds play land, he did not. oh yeah, he moved to vegas (sin city) after our split and his stint in detox and AA. So he never sees his son anymore after living with him for the first 2.5 yrs of my son’s life. Am I wrong? i’m not holding him away from his father, just making a stipulation. we were never married, so i have full custody and complete legal custody. Daddy was just home this weekend from Vegas (we live in metro east St.louis) and he didn’t once see our son, because he was too selfish and proud to comply with my stipulation of NO Michelle around my son. I’m trying to protect my son from long-term harm and heartbreak. He deserves one on one time with his daddy at his age. he doesn’t deserve to have to compete with another family for attention. I don’t want what has happened to his older brothers to happen to him. his father could have easily come down to mcdonalds to see his son but he refused saying he will see his son under HIS terms. Says he’s taking me to court too. I’m glad, i’d really like to know if i’m doing to the right thing. please, someone give me some advise. HELP!!!! i think about this day and night on whether i’m doing the right thing for my son.

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