Jock,
This is not an easy problem to be solved, but luckily I am here to give you some informed advice.
Now. a)�..Her little t1ts bother you.
b)�..Her little t1ts bother her.
From what you have said, a) does not apply, so we will focus on b)
Bottom line is:
a) He must live with the having little t1ts
b) She needs a breast augmentation operation��.implant.
c) clearly does not apply in her case, so we will concentrate on b)
Are you with me so far?
Ummmm has given some excellent advice, given with sincerity and understanding.
Your girlfriend must concentrate on the positive aspects of her persona, good looks, nice hair, nice bum, good at oral and so on and you must focus on these. In my vast experience of such matters, it is often the case that women who have small t1ts are often more sensitive to breast and nipple stimulation often resulting in premature orgasm (if any orgasm can be premature)
We all have hang-ups about some parts of our bodies and we never lose conscious of them, but we learn to live with them, and, with your help, jock, so will she.