Welcome back, I'm afraid I don't know what you were discussing before, but your post today is very clear. And no it does not paint a good picture.
Physical pain seems, for me too, to promote frustration and make all my MH symptoms more pronounced. Then you add in the worry if everything will clear up until you as fit as before, plus workplace hassles, now you have a mix of meds as well. On top friends who, even if they are well disposed to you, do not have the experience or imagination to understand.
OK, a heap of hassles, somethings however stand out - you are not self harming. This is a real achievement, and to stay off for four years is very encouraging - impressive. I wonder if it had the same beneficial effect on that young girl, I hope so. I'd guess you may be over that, even if sometimes the temptation can be strong. If in doubt please seek competent help before anything happens, don't leave it too late. Techniques are available. Do you think that might be reasonable?
Unsympathetic or off-track medical support. Well that's 4 in 16 years, there are others. Do you think finding one who 'clicks' is a possibility? I'm no doctor but have been under treatment for a long time. I've come very much to the conclusion it is my confidence and rapport with the professional that makes treatment successful, not extra qualifications or price.
You also talk of a person who is starting to mean a lot to you. " this person makes me smile & makes me feel good about myself". Well true you will feel this person's absence when you are apart -that is only natural. However this is something you may end up treasuring.
As for disclosing your conditions, well I would think that is a judgment call. There have been occasions where I have eased into it gradually, and by doing so have got the person used to the idea all is not perfect, that way there is less of a shock when eventually the full facts are know. I'm not advising, you have to be the judge, and I guess that depends on your assessment of that other person.
You are not alone, we may only appear as text on a screen, but are real people and understand and do care