Sounds like the OP is in for a ride.
When your gut feeling tells you something is wrong is best if you cut your losses short.
I had a very bad gut feeling that my gf was cheating on me (not sexually) at the time but emotionally: spending too much time with her new male friend (who also happens to look like a model and had just moved in to the same house). This coupled along with some red flags (making references about him on her FB status, flirty texts with him, a bit distanced from me and the dead give away- the way she gazed at him, not to mention constantly smoking in the garden with him when she doesn't even smoke!) were the give away signals.
I called and dumped her soon afterwards. When I saw her she eventually admitted she fancied him.
It hurt but I saved myself alot of heartache in the future