How can I navigate intimacy fears with my partner after cancer surgeries?

Was diagnosed in 2018 with Mycosis Fungordis T cell Lymphoma no remission will happen. Many rounds of radiation ,my skin so so frail. In the end of 2019 into 2020 I had a stem cell transplant, it was rough, I almost lost my life , I knew God and began to lean on him. In 2023 diagnosed with vulva and anal cancer had so much pain and uncomfortable. 2024_Feb2025 Surgery on both areas took my anis and vaginia ending with an ostomey bag and a urethra to pee from.(no more sex ever) In 2025 I was diagnosed with a sarcoma on my chest , had surgery Nov 25 My best friend of 30 years shows up in my so called life.asked me to Marry him. I’m 63 yrs old I totally gave up on a relationship ever, and being intimate We discussed everything ,with him saying it was ok we could get through it. We’ve both had bad relationships and scars from them. I have fears of intimacy, in one breath he says it’s ok and in another he asks why he isn’t enough because I won’t help him release, it makes me feel cheep and I reminds me of my loss of not being able to give him what he needs. He tells me he hurts, his heart hurts, and me I’m hurting also my heart is broken. He makes me feel like it’s my fault, I’m sick a lot and always tired. I can’t sleep with out medication,he’s ready for bed at 830 / 900 at night I’m waiting on meds to kick in. I’ve slept with a body pillow since 2018.till this day and he thinks I’m blocking him. Help me