It all depends how long you stayed with your 3 entries this year, if just a few weeks each entry then you returned "home" you will be fine as that is the bahaviour of a typical tourist
If your girlfriend has a longterm lease she could try to set up an account online to add you as a guest and generate your TM30s as required. It's a 2 step process, set up account, add address and then add foreigner staying.