Not sure he sees it for what it is yet - so that would be the first step. He has been with her 3 years since he was 14, just turning 15. She constantly stalks and monitors him. Early on I had to tell him that her on face time in his phone all evening watching (an interrupting) him whilst he was doing his home work was not normal. Phone calls, texts, snap chat etc went on through the night. If he didn’t pick up she would ring incessantly (FT would ring on one of our lap tops) and could go on repeatedly for 30mins. We would hear her screaming at him down the phone late at night. She changed uni choices and changed to defer to a year out to match his movements. This backfired as he ended up somewhere else this year in clearing as he had massively underachieved. She had caused major disruption at our family events. She wanted to take him to uni instead of us - we pushed back and that caused a scene. However we have just found out that she went up when we left and has been staying in his halls all week. I feel that we should have stepped in much earlier - I don’t want a debate about whether this is a controlling relationship or not right now, as I have read enough to determine that - I just need some direction as to how we can support him.