My friend constantly rings and texts all day every day its draining me and suffocating me she's so needy and clingy and just wants to talk for hours about anything to the point when I do pickup cause I feel bad if I ignore her that I zone out as quite often she goes quiet and doesn't know what say anymore.the thing is I'm a single parent with a child with asd and gdd I'm his main career and it's exhausting and extremely hard which I don't think she gets that I'm burned out as I don't have any help don't get much sleep or time to myself as he needs constant supervision.she will msg at inappropriate hours in the morning 5am before I'm woke to tell me she let her cat out.its same every morning!I get up get my son ready for school which is extremely hard work and once I have him out the door to his bus which lifts him the phone rings and rings n rings.i feel bad and sometimes will answer because she has been there for me when I went through a very difficult breakup but now I can't cope with it anymore she will talk for hours to I say I have things to do and only way to end the call is repeatldy say bye.10mins later she rings back now this goes on all day long literally every 10mins to half hour either rings or msgs.ive snapped before as she rings as I'm trying to settle my son for bed and it takes hours and she starts to huff.i have repeatedly told her don't ring at his bedtime hour its like my life revolves around her.the only time I get to myself is during the day to get things done and she constant rings n msgs.she demands I answer asks me to do things for her like cat sit when she wants to go away and fix rings in her house.i can't cope with it anymore it's having effect my already mental health.she will turn upto my house every day now too.how do I tell her to back off.its not normal