I think I made a mistake?

I met this girl from ukrajin, we live in the same hotel. Two weeks have passed getting to know each other. She was in very abusive relationship for 8 years and is still bitter about it.

We met for some drinks in the hotel bar and ended up going to my room and we have since hooked up a couple of times.

Today she told me she has a night shift but will see me once she is done. She gave a teddy bear today so that I can always be with her so i accepted.

fast forward an hour i saw her with another guy going out of the same hotel we live in and 30 mins later she they came back together.

at this moment i was shocked that she told me she was going to work. Seems it was planned so i will not go to her room.

my emotions took the better of me, i went to her hotel room and it was locked so i called and my calls were ignored.

my guess she went to the room of the other guy and they are doing for only god knows.

She once told me that she can only sleep with one person at a time and was telling me that she is only seeing me which was a lie.

i have just decided no never contact her or is it ok for me to talk to her about it the next time i see her but my guess she is cheating?

i was really developing feeling for this girl but i guess it was a mistake and now i must just assume nothing ever happened between us.

do you guys have and sound advice?

I think I made a mistake?
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