Should i forgive my husband of 14 years for cheating on me?

i have been married for 14 years and my husband cheated on me and the woman the woman that he cheated with had a child. i asked him if the child was his and he told me that it was not. he said that he had an dna test that the child was not his i did not see the test result but he said that he did. he wont's me to take his word for it. but i cant i saw the child and it looks like me children. but he still wont omit to it. i wont a dorivce from him so i can get on with my life. i still love him but i dont know what to do