A problem? Depends upon your definition! You are certainly going to need to apply for a CoA. Armed with that any problem, if you define needing to apply for CoA as a problem, goes away.Does that mean I'm going to have a problem getting married to my girlfriend
Totally accepted, but in the past, prior to these regulations coming in, there were failed asylum seekers etc marrying in particular non-UK EEA Citizens and then applying for Residence Permits based upon the marriage. Not saying I agree with these regulations but totally understand why the Government introduced this legislation.This aint gonna be no sham marriage or whatever they call it at the HO.
You have a valid visa, with at least three months left on it. You should not encounter a problem getting a CoA.
It is always open to you to marry outside the UK, for example in your beloved's country!