And who do you think your resentment's going to affect most? I'm only going to say this once, so I want you to pay careful attention.
You do not need approval from your children in order to date!
Taking care of yourself first is what I call the "oxygen mask" principle.
Making the mental transition from parent to person is one thing, but there are also practical matters to be considered.
Dating when you have children offers some challenges that aren't present when you are footloose and fancy free, but there is no reason why you can't be a parent and still have a rich and fulfilling social life.
To help boost your confidence, take more care with your appearance than you might be in the habit of doing.
When you're out doing errands on the weekend, wear something that flatters you, even if it's just a pair of great-looking jeans, instead of wearing cutoffs or sweats. A different haircut and an updated wardrobe are both good ways to feel more attractive and desirable.