My husband of 26yrs left me four months ago for an 18yr old girl i do get past all this pain?

i have been with my husband for 26yrs we were happy at least i thought. 4 months ago i got a phone call for someone telling me he was cheating with a girl from his work i asked him of course he said he wasnt so i looked in our cell phone logs and sure enough i found her number this person is 18yrs old. the day he moved out he moved in with her we have 3kids and 3 grandkids he dont call them or see them he left me in dept not to mention the cell phone bill he ran up 18400.00 I am so lost and hurt i just want to be happy like he is i will never take him back. how can i get over this