Hey, So I have been living in a new town for about a year now and have met a few friends but not really friends that I talk to much. I met a girl in July last year and we were exclusive for 4 months before she ended the relationship based on me being too nice and needy. I found that throughout our relationship a lot of my needy attitude came on because I noticed that she would always hide who she was texting on her phone and there were a few instances where I would be looking at her when she just got on to her computer then she would quickly close a Skype chat or something and think that I didn't notice but I notice her look at me as if she was thinking "I hope he didnt see that", and also she kept things such as the fact that she met her "guy friend" a few times before I realized that she was meeting him one night at a club so I walked in and was spotted, the look on her face was pure shock but then she introduced me to him but I walked off. That was not how the relationship ended, but anyway, so for the next 2 months after we broke up I was still really in love with her and she would keep saying "I love you" and we still kissed etc, however I soon realized that she has been having sex with a guy friend but she does not know that I know.

It has been 3 months now and we still text eachother everyday and say good morningx and goodnight x, the other night she was scared so I stayed on her couch and she kissed me and laid there but nothing else.
She lies about what she is doing, not that she should have to tell me but she finds the need to tell me that she is doing a certain thing when I know that she is off having sex or has a guy over, but she just has to tell me something else.

The guy who she was with at the club, I know for a fact that she has always been in love with him but he does not want to be with her, yet tonight they are having sex and I know that just before she went to bed she sent me a text saying "goodnight xxx".

This woman is 33 and I am 27, so there is an age difference and she is older but we get along very well.

When I go around to her place we just sit on the couch and she hugs in to me most of the time and we kiss when we say bye etc but no more than that, yet she asks her other guy friend over just to have sex sometimes even just after I have been there.

What goes through a womans head when she does this? Does a woman feel any sort of guilt?

The main thing here is that she does not know that I know she has been sleeping around and that I know certain friends she has told me she has never had sex with, she has and is still. It's the feeling that I get when I know she is lying but if I was to say anything then that would just sound stalkerish maybe?

You see as I said earlier I havent been in town for long so I do not have a big group of good friends, I find that she has been the only good friend I have made but she is very deceitful, I do not think that she has been faking us being friends though, I care for her so much and I do not even know if it love or the fact that I just do not know many people and maybe it is sexual aswel.

I just want some advice, what would you do in my situation?