Me & my 3 y/o ds dad split up whilst I was pregnant and he has been in and out of his life since he was born, he is an alcoholic & takes drugs (reason's why our relationship ended) thankfully my ds has a step dad as an amazing role model. When DS was born ex showed no interest. When he was a few months old ex said he wanted to start seeing him, he came round to see him every weekend, he was always completely plastered which resulted in him passing out on my sofa without actually spending any time with him. I told him to not come round unless he was sober and clean of all drugs. He didn't bother with him again until he was 1 and announced he is "trying" to change and wanted contact again. I met him at the park with our son a few times, he was sober and things where ok, they interacted for a while but they didn't seem to be bonding much. He would just sit and look at his phone whilst I pushed him on the swings etc. On one occasion he told me he was going for a cigarette and came back high and smelling heavily of cannabis to which I told him I was going home. This happened a few more occasions until he turned up drunk with a beer in his hand and I said it had to stop and I couldn't keep doing this the way he was.
Few months of no contact and he asked to have him over his to see his family on the basis of his mum being there at all times (I talked to her on the phone and she agreed) She was supposed to drop him home that evening but she didn't, I phoned her and she said that "She had gone out and he had been left with my ex" I went to his house to collect him and he was drunk and high with multiple friends over (who I don't know) all of whom where drinking and doing drugs and two of them where in the other room having sex. I took my son instantly and told him he could not see him anymore and he didn't seem to care. He is in and out of jobs (he keeps getting fired because of his alcohol issues) He has been in hospital on multiple occasions for alcohol related fits.
Fast forward two years, he has not made any contact or asked to see him until now. He made contact with me back last September to ask if he could burrow money as he owed it to someone (the cheek of it) No birthday or Christmas presents, nothing. He messages me and says he has "cleaned up" has been completely clean and sober for six months and want's to re build his life and start a relationship with his son. I just feel like the damage is done and like I can not trust him at all now, I know he will go back to his old ways. My son knows who his dad is, he never talks about him or expresses any interest to see him, they never bonded. He has a good relationship to his now step dad but he is clear this is not his dad and he does not call him dad. I just personally feel like it is not a good idea to get him involved with this man when he is not bonded or attached at all, rather than get him involved and attached then have him let him down or put him in danger. He keeps telling me he deserves a second chance, but I have given him so many chances.