need a book suggestion — going through my first ever breakup (3yrs – relationship) .. would like to delve into reading books

hi,
iam (22m) I broke up with my gf(22f) after she cheated on me after 3 years of relationship– she was the love of my life and my first gf ever
,, so now im here looking for some books I could read maybe to try getting over her or making my mental faculties to be in a better position or any of that stuff ,,, I dont know exactly what to read and what to feel…
it would be great if anyone reading my post would suggest some books (im not interested in topics like revenge or any other stuff as im not seeking to get back to her in that way )

I would like to find some inner peace and I am in search of trying to find myself, so any book which would come under this criteria would really help me a lot…
thank in advance 😁