being a student for 5 years doesnt allow you to stay in the uk indefinetly. the only possible way is if you stayed with a student visa for a period of 10 years or more(based on long residency rule) then you might have a chance to naturalisation. that being said bear in mind that uni student fees (international) starts from £8000.... plus you cant take successive short courses( ie english courses) for a period of more than 2 years(so basically you r stuck with uni degrees).

if you have recenly graduated from a UK uni with a 2.2 you might have a chance to stay here for another year working full time .

provide me with more details and i can give you more specific answers