Love this girl but shes going back home

Theres this girl at work who is here in the UK on a student Visa. We have now known each other for about 6 months, and she is going back to her country in 2 months time (she me when she was going back, but this just skipped my mind as I was so badly in love).

Recently we have been getting really close, and our friendship has become very solid to the point where I think it is leading to a relationship (we have discussed this, and agreed to not have one to avoid hurt) but it is still looking like it could lead to one.

The girl clearly likes me, and she already knows I like her, but I am feeling depresses as she wil be gone in 2 months, and I will probably never see her again.

If she stays here with me, i.e. if we get married then she would betray her parents who she is very fond of. but If she goes home, then she will probably be married within a matter of months due to the culture in her homeland.

I am seeking advice on how to handle this situation.

It would be really hard to communicate with her when she goes back as I would have to ring her house, and wouldnt want to interfere with her life at home.

I think I should make the most of the time shes here, but I think I would be depressed for months and months after.

It just really annoys me that a thing such as visa is the main problem here.

Please help me someone