Its been just 12 weeks , i wouldnt beleive anyone who said they were ok after just 12 weeks, its hardly anything , cut yourself some slack .
I read that it takes between 2 to 5 years to get over a divorce , emotionally and financially ect . I was ok after about 18 months , but it really is like a bereavment.
I posted something similar to you at the time and i honestly wondered how i was ever going to be ok again.
Well heres the good news , it doesnt just get easier , eventually it gets better. One day someone will mention him and youll be like " Who "? Seems unlikeley , i know , but you will .
Try to think of it as a journey , its not the end , its just the beginning , think of it as a transformation , the caterpillar / butterfly ect . Be kind to yourself , i would run a bath and sob and feel sorry for myself , id rant and rave in the car ( when i was alone ) and i scribbled furiously each night into a journal. Eventually it just eased off , and id realise it would be lunchtime before i thought about it , then tea time , then a full day .
I wanted to skip it , i couldnt stand it , some days i couldnt even face going out as i couldnt trust myself not to cry .But as painfull as it was i learned a lot about myself , things i wouldnt have known otherwise . Im sort of gratefull for that in a strange way .
And no more of this you played a part , you had NO part in him cheating. At all . You sound a loveley person , and things WILL get better for you. Do post if you want to chat , lots of us have been through something similar.