feeling very lonely!

Seanymph

can you find something to look forwards with? A journey with the children (Rome is great for kids), or camping? Or visiting a friend you haven't seen for ages? Or a course online (I study with the Open University, they give grants for fees, and you study at home, but get to meet people at tutorials too - you also talk to other students online) - can you retrain for something with better hours?
You've invested enough in him - I worry about the amount of posts here about 'finding someone' to take away the loneliness - personally I think learning to be ok being alone is the first step. It's terrifying, I remember laying in bed after he'd gone worrying about how I would get two kids out myself in a fire. It's amazing what you obssess about.
But you have now the opportunity to find pleasure in your own self, your own interests - pick a footpath near you and with the kids walk the entire length. Or get an allotment. Or grow cress. Or take up cooking something you've never eaten every Friday.
There are no limits now to what you can do with you time - or your future.
Look forwards as much as you can, plan something, research something, spend time with your kids, and try and enjoy the quiet times. There is plenty of time to bump into another MR................. but this time for you to be alone and learn to enjoy the quietness, that'll probably not come along again.

Alikay

If you've only just realised the relationship is over for good, maybe you need to grieve and go through the misery for a little while before moving on to rebuilding your life. You probably aren't ready for new friends if it's only the last few days you've cut contact with your ex: You certainly won't be wanting any "whwarr.... show us yer t1ts and let's have a butcher's at your daughter!" type weirdos!!

Seriously, you're doing well at the moment just coping with life, work and the kids. Maybe as Seanymph suggests, just plan a little treat to focus on for now and leave the "life changing" stuff until the new year when you feel stronger. Good luck x