I hope Oana managed to contact the Romanian I told you about.
Do you plan to marry? If so, do it in UK. Then she can come here and stay. At first they give her a month, then three, then eventually a year.
To apply for this pass, you must supply marriage certs, birth certs - the ones for your wife will need to be translated. Lots of passport size photos, pictures of wedding etc. (yes, I'm not kicdding!)
Give it some thought before coming back. The immigration experience is not good, it's very stressful both for you and her. She will not get PR until 15 years down the road unless they relax the policy.
I wish you look. Get lots of info befoer you come back. Try to get work in UK. Everything is expensive here.