This thread makes sad reading particularly the replies that advise the op just to concentrate on her dcs. Yes, they are the number one priority, but the op is an adult woman who has her own needs outside the role of being a mother. I would hate to think I'd miss out on the love, support, passion, friendship and everything else that comes with being in a good relationship and I don't think it has to be that way.
Of course its more difficult to date when you have children, but it's far from impossible. Things just need to be taken more slowly but that's no bad thing overall.
I am seeing a lovely man I met online and we have five children between us so the logistics can be a bit tricky. But it works out, most of the time. Our children all know we're seeing each other, but we're not ready yet to be introduced to each others children. But when we are, again we'll do it slowly and carefully, and I hope it will work out fine.
Don't despair, op, it can work. I've had lots of support on the dating thread - people on there are full of support and advice, so that might help you a bit too.