singleds1, so sorry to hear you feeling so sad. i wrote on that 'happier being single thread', because i am now. it took me a long time though! a year after my break up with dd's father i was feeling exactly like you. it took time.
all i did was do what i could. get up, wash her and myself, cook three meals, keep the house somewhat tidy. i was surviving. it started getting easier about eighteen months after the break up. time is a great healer, i promise you. you will feel really happy and fulfilled and full of hope some day, you really will. you just need to take each day as it comes.
emotionally, i grew stronger by setting goals for myself and believing i could achieve them. i gave myself a lot of respect for dealing with all the bad things that happened to me. i was kind to myself. i knew that it would take time, but i just had to make a tiny step forward every day.
practically, i attacked my goals. they were small things at the start like don't cry in front of dd, don't text x, eat more vegetables, stop staying up late upset and being tired, don't drink wine sunday nights.
after a while they got bigger: paint my living room, go to the park once a week with dd, ask a friend over on a saturday night once a month, cook a new meal with dd every fortnight, write plans of what i would like my life to be like in five years, rent out funny films to encourage myself to laugh.
then i moved my goals even further forward: go out with friends on a night out, apply for a postgraduate course and complete it, move house into a place with no bad memories, learn to drive, start looking after myself more by getting hair cut every few months, trying new make-up, buying myself some clothes every so often (perhaps superficial but confidence boosting and feels like you're exploring a new side of yourself).
its a process but it happens. take it slowly, and practice gratitude - it helped me. also write down your good points, the things you have achieved, and what you will achieve in the future. you are a young woman - 33?! you have your whole life ahead of you and a beautiful son. you can start getting excited about your future again, who knows what tomorrow will bring .