Why won't he leave me alone????

The last three weeks have been great, I've been happier, the kids have been happier then last Friday the ex comes back from holiday and starts texting me.   Not the kind of text I was expecting.....he hadn't asked for the kids in the whole time he was away so obviously when I got the message and it was from him I was expecting him to ask how the kids were but no he text me to tell me that his sister's mother-in-law had died.  I have never met the woman and have absolutely no idea why he felt this information was of any relevance whatsoever to my life.    I ignored the text and did not reply.  The texts from him continued all day and I ignored them all.

Saturday night arrives and so does another text telling me that he is sick of subsidising my lifestyle and is stopping paying his share of the mortgage.  I would like to add that I work and pay for everything for me and in the five months since he has left I have been on one night out.  I don't have an extravagant lifestyle, we don't eat out and basically once the kids are in bed thats us.   He pays half the mortgage which I am told by my solicitor he is legally obliged to do as long as his name remains on the mortgage.  I think he may be annoyed at me for ignorning him.  I just feel that every time we text each other it ends in a big argument and nothing at all gets achieved.  The last time I text him was to tell him that our daughter had been upset at nursery and he told me to go f**k myself. 

I don't know what to think, is he regretting what he has done and feels the need to be in touch with me all the time?  If he was in touch about the children then I could understand why he is in touch but he never mentions them.  I know that there is no going back for us too many things have been said and done not least the fact that he has got another woman pregnant.  I just feel that I am a much happier person when we have no contact with each other, he is the one that wanted everything to be done through solicitors and I am trying my hardest to stick to that. 

Anyway I think thats enough of a rant for one evening.  xxx