Lies until the truth comes out. what now?

[Crazy-N-Love]

Me and my girlfriend have been together for a year and a half. She was only out of a relationship for three months before we started seeing each other. Her ex and my former best friend went to prison, they was together for 2 years and have a son. But we fell in love in the first three months of us being together she went behind my back and sent him a b-day card saying how he was the best husband and she signed it love always your wife, there were never married, and she also went to visit him, the way I found out is he mailed the card to my house, with a letter saying she came to see him since I didn't have proof of the visit she denied it.Now a year and a half into our relationship I gave her a free pass to tell me anything. she admitted to visiting that one time and told me they didnt talk about love or anything just their son. That was in the first three months on the fourth month month I read her diary I know it was wrong but I did, his name was in it with a heart around it, she was supposed to be at her parents she wasnt she was at a memorial day party I know she wasnt drinking becouse by now she was pregnant with my son but I went and found her and broke up with her. The same day she wrote him a letter saying she thought she might still love him and it would be easier if my son was his and wondering why he cheated on her so many times it wasnt until a weekago i found out about the visit or the letter and we was seperated for one week in that week we text everyday one day she wasnt texting back the next morning she did and said she was at her cousins it wasnt untill today I found out the truth she was at her sisters boyfriend he does live in the country and there is no cell phone signal but why did she lie and not tell the truth. Also a couple months ago I gave her a test I used my friends phone and text her saying it was an old boyfriend and I loved her and wanted to see her she never text back but also never told me and she was in the same room as me when some of the text came to her phone. I love her so much but getting the whole truth from her is like pulling teeth. She finally did when I gave her the free pass but she sugar coated it so the next day I told her I knew she was still lieing and this time tell the truth no matter how much it hurts me she did at least I think. But it seems like the first four months she lied so much she dont even remember them all. What do I do I gave her a free pass but Im hurt and mad and little things keep popping up, breaking up is not an option. She told me she feels bad and I know she does she also gave me a free pass to cheat talk to one of my exs or whatever I know I shouldnt but it seems temting to hurt her the way she did me. What to do?

[blinki]

she doesn't feel bad. do you really believe that!?

[steviej]

It's about time you started acting like an adult. You've got a kid with her, maybe i've misread but all this crap happened in the first couple of months when she was only 3 months out of her previous relationship.

You broke up with her over something that happened over a year ago... does the last 12 months not count for anything?

You're punishing her over something which might have ceased to be any kind of issue a long time ago, be careful how far you take it.