Nervous About Dad's surgery next month, and i'm nervous i'll end up being like him.

I really thought i wouldn't end up here, especially after my last post being all happy and fun. but i don't know where to put this story.

i'm not close with my dad to the point where i could tell him personal things that him in my life to him, but i resemble him a lot. especially because i'm overweight like him (working so hard to lose weight) and i just got told he's having surgery next month, because, well, he's overweight and he had tumors that could grow back. (not specifying where)

he's been struggling to walk and he sits for most of the day, and when he does walk he uses a walker to get around everywhere just at home. he hasn't been out in a while and when he is he's often at the hospital for check-ups. 

he's continuously eating as before, but more veggies and no red meat, as what the doctors said. for me, its carbs i have to cut but i can't seem to do it, so i've been walking a lot more and trying to go out as much as possible and drinking more water. 

I'm trying to look at the positives here, he did say earlier to his sister, my aunt, that he does want to get better and he's truly trying and i believe in him and i believe that surgery could go well. 

but none of my family members ever had surgery, at least no surgery for a few decades. i've only known that my mom had surgery to remove her gull bladder, maybe her gull bladder stones? i'm not too sure. and i've got a huge phobia of surgery and i'm terrified it doesn't go well. 

I don't want him to die and i want to be healthy, i want him to see me graduate. but it sucks being in a family where health issues are just passed down.