Think she's lying to me, but she won't admit it.

[styleman]

The girl I am seeing, I have reasons to believe that she is 'progressing' with another guy.
What I know is very vague, but I've even as far as seen her receiving flirtatious texts.
When I asked her whether this was the case, she denied it, and claimed that the texts were harmless and the guy was 'just a friend'.
Her reaction was strange, normally, if I say anything negative to her she gets very confrontational, but she was quite calm in this situation, simply saying things like 'I wouldn't lie to you'. I asked her, does that mean I should just ignore it then, her response 'there's nothing to ignore'...

 

[styleman]

Should I confront her again, or is she telling the truth?

 

[ready123]

receiving flirtatious texts? that's it?

 

[styleman]

receiving flirtatious texts? that's it?

Well she's met the guy alone, which she told me about herself when I asked her... I have no idea whether she's kissed/slept with this guy...