Running out of options and time?

My boyfriend is 29 now, he was first diagnosed with cancer when he was 27 (I am 27 now) so for the last 2 years it's been a very intense time. He got the all clear earlier this year but unfortunately it's come back, he's had rounds of chemo which initially started working but eventually stopped working. He's just finished a few rounds of immunotherapy and we found out today that it hasn't worked at all, made no difference to the cancer whatsoever. The next option might be radiotherapy but they are worried about his heart which is very close to the cancer. We will find out more on Friday.

I find myself watching him sometimes go about his usual day and I think how can I lose this person who makes me the happiest and who I want to continue building a life with, we have so so much to look forward to together. I don't even know how to describe my emotions at this point, I've felt such a range of emotions over the last 2 years, I'm almost feeling completely numb at this point and can't believe this is happening to him/us.

Not sure what I'm expecting from sharing this, just feeling overwhelmed and wanted a place to share.

Thanks for listening, make sure to give your loved ones a big hug and kiss tonight life is short x x