thanks all so much, have read everyone's comments and do feel a bit better about my running.
Have had a good think about it all today and think maybe cos I've started running with the club and really pushing myself, plus the fact that I don't eat much (i know that doesn't make sense) and don't drink enough has just made me exhausted!
The club are fantastic people, very supportive and encouraging. When I ran on my own I only ever did long, slow flat runs. With the club I do shorter (4/5mile) faster run with loads of hills - the hills are killing me, maybe i'm pushing myself too much. I've been so knackered from my mid week runs with the club that I've not been going on my own at all at weekend.
You are all correct about my neighbour. He is a middle aged man and knows nothing about exercise of any kind. To be fair to him, I think he was trying to be nice cos he continued on to tell me that men like 'women with meat on them' and how he hopes I'm not flogging myself to death 'just to be thin' cos I'm fine as I am etc etc...but yes, as you have all said, I'd spent the hour of the run feeling very sorry for myself and feeling fat, huge, slow and useless and his remarks were just the last straw. As I came up the drive his first words were 'do you eat a lot?'....WTF??
Anyway, him aside (cos he's irrelevant really), have decided I'm just gonna give myself a week off running this week and just have a rest. Am gonna really try and change my diet and start drinking some water and change my mindset.
At the end of the day, I can always just tone down the runs and just go once a week for the company.
thank you all - this forum is great!