Miley,

Hugs to you, and your mom. It sounds like a difficult situation. You're probably only 15 or 16 right now, old enough to know pain, but too young to make permanent decisions about your future. Don't close yourself off to people who would like to be there to help you, love you, and support you.
My DS could probably have written your OP. Six years ago his dad(my DH) had a benign brain tumor. Only it turned out not to be a brain tumor, but a more insidious auto-immune disorder which has so far entered his brain, lungs and heart. His health is very fragile, although he makes the best of things. It will probably kill him within the next 10yrs. My DS, now 20, has not taken this easily. He is very sensitive to his dad and they are very close. On one occasion he has had to "say his piece" because Daddy might not make it to morning. Very tough stuff for a teen to process. DS can barely talk about it.
I encourage you to talk about your fears with someone you trust, someone older than you. Your peers likely have never walked this road and although they mean the best, they have their own life-crises they're dealing with.
Try to make some plans which include your dad. If you're like us, our "future" is about 3months ahead, no farther. Things change too quickly. So we have some plans for going camping and perhaps WDW in the spring; London,Yellowstone and the Pacific Northwest are in our long-term dreams. But the one thing my DH & I have strived for is to make sure our teens know we don't expect them to give up their lives for us. I'm sure your mom & dad would want you to have a normal life which may or may not include marriage and kids. Not getting married and not having kids
out of fear or losing someone you love isn't a healthy way to making a life.
Talk to someone you trust. Talk to your om, your dad--parents live for stuff like this

Let them know your hurting and scared. It's not all up to you. Let them help. It's what parents do.
