DS1 is 6. Every time I need to ask him to do something slightly differently (playing a bit rough with DS 2 (2)) he goes straight to saying "everyone hates me" " you don't like me""I wish I was dead". These can be when I do have to correct his behaviour or I suggest that the young one may not like that (clearly doesn't like it) and whether they could play with this or that. He also 'tries' to hurt himself. Bangs his head gently against the floor or wall.
It culminated one afternoon where is ran away from me and as I slowly walked towards him he ran further away. Eventually I found him but I feel I can't trust him. Now when we're out he threatens to run away and starts to go. I cut our park visit short because of this. I don't know how to get through to him that I don't hate him. I love him. I can't keep saying this as it feels he uses it as an excuse to not be told off.
Does anyone have any tips and tricks for this?