I think my girlfriend might be cheating or about to cheat on me
I have been with my girlfriend for 18 months now, but we have known each other and been best friends for over 3 years. I love her more than anything else in the world, and she is always telling me she loves me as well. We have often talked about the future, and she has made it clear in the past that she wants to marry me some day. I get on really well with all her family and friends. On paper, we look like the perfect couple.
We used to live together while studying at University, which was great. At the moment, we both live apart in our hometowns, which are still only 45 minutes down the motorway from each other, and we both drive. In the past few months, we haven't been as close as we were because of this, but we still see each other around 3 days a week, and stay at each others houses when we can. At the moment, I am doing freelance work from home, and she is completing a Uni course in her hometown, which involves her being on a placement.
The issue I have is with another guy that she is on placement with. She talks about him from time to time, and recently has started texting him a lot, more than she texts me. I have seen some of these texts, and some are really flirtatious, which upsets me quite a bit. In these texts, I am never mentioned either, even when we are doing things together. She even had a dream about him, which she told me about. The problem is, she also told him about it, describing it as "exciting". My girlfriend has cheated on her ex in the past, but since we have been together I am sure she hasn't. Her old boyfriend was very controlling, which is exactly what pushed her away, and exactly what I don't want to be like.
She sees him in this placement 3 times a week, but recently he has been tutoring her for an upcoming exam. She tells me that another girl is there too when this is happening, which I believe her about, but I recently read a text where she asked him to meet up for a drink after Uni sometime, though she did state on the text "not in that way". This guy is very much a "player". She has told me he has naked pictures of his ex girlfriends on his phone (which I find very odd and actually quite scary), and boasts that he has slept with 23 women.
Recently, my girlfriend has expressed that I need to spice up our relationship a bit, make it a bit more exciting because it was becoming a bit stale in her eyes. The past few days I have done just that. She also said I don't contact her enough when we are away from each other, and my texts are not long enough. I have made sure in future to text her whenever I can. I'm hoping this might cause her to lose interest in this other guy?
I know many people might say its some kind of trust issue, but honestly I have no problem with her chatting to other guys I know. She can text them all day for all I like because I trust her with them. Its just this one guy I have never met.
I have spoken to her about the issue, and she tells me she doesn't fancy him, but I can't help but feel like she is keeping something from me. As well as this, I don't trust this guy at all. Is it me being paranoid, or is there something possibly happening? I love her more than anything, and I know she loves me too but I just can't help but feel this way. Should I ask her to set up some kind of meeting with him? So we can all go for a coffee or something?
EDIT: I should also note that she has mentioned booking a holiday next year for just the two of us, so she is obviously still thinking long-term about our relationship.
