How is it your fault that you are ill? If he wasn't willing to be there for this, he wouldn't be there for any other thing where you needed someone to stand with you. As much as it hurts and is scary, you don't need dead weight on you right now and that's all someone like that would be.
You can heal - and much better without the added stress of a bad relationship. I was infected at the age of 7 and didn't get effective treatment until I was 47. Although I do deal with some permanent damage, I no longer have active symptoms - so if that's not too long to go without treatment, then you are fine.
Unfortunately, no one can tell you that it won't (or will) be too hard on you to take abx - but there are things that can be done to help ease the symptoms and there are alternative treatments that work very well also. You have plenty of options!!!
Take a deep breath and realize that even though you may be scared, your world isn't falling apart. Do you have a face-to-face support group that you can go to? Many times having someone that you can actually touch to tell your troubles to helps a lot. Hugs are good things to calm a person and let them know that things will work out.
And never forget you've got us!!!