Thank you all for your encouragement and advice, without this I would be nowhere today. Locks changed on gate, chain on front door. Now at M+D's, very very nice neighbour looking after cats (Aunty Sue, she's fab, put her arms around me straight away). Typical me that I'm devastated about all the stress the cats are going through, they're my total joy.
Also managed to eat one fried egg on bread and a yogurt.
I'm now worried you might think I'm not 'so together'. I texted him and said 'Agree we need to talk, but not tonight. I need to know what is going on. Is tomorrow convenient? and within minutes I've had the most garbled emotional text ever. The man has lost it. I'm now at my parents and can hear HIS mum on the phone to mine. The text was along the lines of 'I love you so much, don't want to lose you, I want us to be together,.... blah blah.' He misses me, he misses the cats. Not replied, but might do tonight with something along the lines of 'I need to know what this is about' and that's all. This type of reacton from me (i.e. cool) is working. I haven't, and won't, plead or beg just now.
I rang up the free Relate service this afternoon and chatted to someone for over an hour. She was AMAZING. We talked about the pressure of his job (his travelling away, difficult for us to get into a routine), the immense pressure of TTC, she analysed both sides and made me reflect. She thought he sounds like he's an Asperger's Breakdown. Not sure if this is correct, but she said many of his characteristics (temporarility going off on one, running away, complete lack of empathy, only one viewpoint on things, has to experience pain to feel it for others,....). It was very useful, but she still said it's something HE needs to deal with, and admits that these people are incredibly difficult in relationships if they don't admit the issue.
Anyway, I'm rambling. Intrigued now what HIS Mum is saying to mine. I'm very wary that all this may be a screen and he'll still leave at the end of it. Not making any huge decisions, but not pandering. But I DO need to keep some communication open to try and get some answers, that I do know. But as the lady from Relate says, try to make sure you're doing it for YOUR benefit and not his.