I am in a long distance relationship with a girl for four month's. We talk on the...

[Mark]

...phone every two to thr? Every 2 or 3 day's. We see each other on her day's off which are every other weekend and either a Mon, Tues, or Thurs during the week.( She has one of these day's off, when she has the weekend off, but the weekday is always different.) I am currently laid off and am collecting unemployment. She said that she does not like the distance between each other( 1 hour and 10 min drive time) and she also said she needs some space. I met her parent's a couple of week's ago and was told by this girl that they liked me. Then she tell's me on the phone that her mother invited her to dinner and brought another guy there to meet her. And my girlfriend said she might be interested in dating this guy. She also said that she does not feel the spark in our relationship anymore and that she does not feel those butterflies or feelings for me anymore either. But she says she still likes me, and I'm confused, and I think she knew the whole time about the other guy and has been doing this behind my back( although she claims that dinner with her mother was the first time they met.) I really like this girl, and I thought she was a good girl, and marriage material. I will probably give her some space, but I do not know if I can forgive her for this and this will also raise trust issues with her, which I have never had a problem with before. Please help, what should I do? I am 29 years old and she is 27 years old.