u/Mokumove

I (F 30yo) have been recovering from a severe health issue (a very painful UTI/bladder infection) for the past three weeks. The pain has been excruciating. I had finally been symptom-free for a week while on my 2 round of antibiotics.
However, my boyfriend (M 34yo) complained that it was "hard for him" to go without sex. Because of his pressure, I gave in and we had intercourse. The next morning, my symptoms immediately flared up again. I am back to square one: in severe pain, drinking tons of water, and relying on Ibuprofen.
Right after this happened, his mother had a bicycle accident in a roundabout. A car hit her going about 4-5 km/h, and she fell.
Despite her age, she was able to get up and drive herself home.
She went to get X-rays and all other checks and seems to be fine but pain in her shoulder and hip (bruising, but thankfully nothing broken).
My boyfriend immediately wanted to drive down to see her at the hospital (and she was released immediately because she had nothing besides bruises). It's a 2-hour drive each way. I was upset because his mother lives with her husband, so she was not alone and had immediate support. Meanwhile, I had nobody here to help me, and he was leaving me alone right after pressuring me into a medical relapse. This turned into a massive fight. He got so angry that I wasn't being understanding about his mother's "emergency" that he even threatened to break up with me.
Ultimately, he promised me he would only be gone for about 6 hours total and would come back the same evening.
He lied. He didn't come back.
To make matters worse, it turns out his mother has an incredible amount of support right now. Not only is her husband there, but her daughter at home (his sister) and two of his aunts of his were also there. She literally has four people taking care of her.
He didn't even stay because of a medical emergency. He stayed the day after to act as a personal chauffeur for routine errands driving her to her family doctor for a check-up and going to the police station to file the accident report. Her injuries are confirmed to be minor, and any of the other family members present could have driven her to do this paperwork.
Meanwhile, I am still entirely alone, dealing with pain from an illness he caused. It my pain gets any worse, l am going to have to call my own parents to come rescue me because he abandoned me. This isn't the first time he leaves me hanging because his family needs something, it happened often(also non-medical obviously) and l've always told him that if shit hits the fan ill be second on his priority list. Why do i feel so abandoned? Like I don’t want nothing to to with this man anymore, am I the buttface?

What would you do? What do you think i need some third party opinions…

Edit: Thank you for all the replies and insights into other people’s perspectives (also medical-related comments). I usually am not so miserable with myself, but in the past if I tried to break up with him, he would seem to not let me and start crying and begging while showing up at my house and putting in more effort for some time, but this time it did go too far. I’m in no contact and broke up. I dont want to ever see him again.