Have a therapist whose first response when I expressed my feelings was "have you considered implants?". Slap in the face, insulting.
You need to find a new therapist. More so if your therapy is about self-esteem/image?
B) people who say they've done it for themselves are talking BS, nobody does this sort of surgery just for themselves, they wouldn't do it if they didn't feel pressured.
You can't possibly know this.
, women who have had a boob job are doing other women a huge disfavour by normalising the procedure which leads to it becoming what people suggest as the obvious remedy to a small breasted woman who has been made feel inadequate. I know personally, a boob job would only make things worse for me as I could never trust my partner didn't like my boobs better post-op. So that's a no.
Yes blame women (sigh) for "normalising a procedure". You've contradicted yourself here - whose fault is it that bigger boobs are seen as the societal "norm". What about the influence of pornography? Why are your feelings about your boobs so centred on your partner's opinion?
*
Also people trying to be helpful with comments such as I won't get back pain, or they won't sag when I'm old, or men will look me in the eyes instead of at my breasts, or I can sleep on my stomach, or that men will be withe for who I am not for my breasts, do much more harm than good. Maybe I would love a man to love my breasts! Maybe I would love if a man couldn't stop looking at them!*
We can't win with you, no matter what we say! You've already got a man who loves your breasts, what's the problem?
I feel so angry when women with breasts complain about them being too big or that guys look at them, that their backs hurt etc. Ungratefulness is the word that comes to mind and I feel like anyone with actual boobs are smug and look down and internally laugh at me or pity me.
So it's okay for you to complain about your breast size "issues" but women with big(ger) breasts can't complain. Seems fair 
This torments me, I feel like I'm between a rock and a hard place. I don't know what I can do to avoid feeling this way and I'm getting bitter. Any thoughts
Yes, stop dwelling on it. We'd all torture ourselves trying to fit to societal "norms" and worry about the size of our noses, whiteness of our teeth, fullness of our lips, length of our hair or nails, thickness of our eyebrows, glossiness of our hair, colour of our eyes, plumpness of our arse etc etc.
Why not focus on what you have got? You'd be a lot happier.