He doesn't consider this cheating

Kh

Long post ahead..So me n my bf had a little issue..we r still together working on things..i just had his baby 3 months ago..little back story..we been together 1 year n a half..gone thru 2 pregnancies..i losst my first baby..but he stuck by me..got pregnant again n then he had to move for recruiting duty..i decided to stay where i was to have the baby n get settled n then meet him all the way in the middle of nowhere..well...i had the baby n it was taking me longer to get to him than planned..really i was having fun living with my mom n letting her spend time with my baby before we leave clear across the country for 3 years..so 3 months later he admits to me that he held this girl's hand..cuddled with her..n spent the night with her..both of them claim they didnt sleep with each other

....but apparently they dated a long time ago..he just finally admitted to me that he used to love her after denying it forever..he claims he didnt cheat bc they didnt sleep together but thats total bs to me..me n the girl talked n she told me everything n answered any questions i had..she sent me screenshots of their conversation n she clearly got mad at him bc he made it seem like he was single..am i overreacting? I dont think i am n i know its cheating..im just curious what other ppl might think..its put a dent in our relationship n things definitely arent the same..im trying to move on just bc he didnt sleep with her but its still hard..if had slept with her it would have been over from the get go..he tried to say he was lonely waiting for me n thats the reason i left when i left so he wouldnt be tempted to do it again..since then he has apologized but only bc i said something...anytime we argue about it he tries to down play it like it aint shit..but i dont agree..i lost trust in him when i used to trust him completely..yes we r still together for the sake of our newborn but yes i do still love him..my question is..what do u consider cheating? How would u handle it? He tries to say i should do the same thing n get it out of my system so we will be even..sometimes i think i should even tho i don't want to..but maybe he will feel how i feel..n worry how i worry..idk..thanks for reading my long ass post!