Death Grip problem

Hi
im 30 years old male
i just realize that death grip is exist and i think i got it
im start faping around age 14 not on porn but just using my imagination
then around 18+ i got access to internet and start faping from porn
in my 10 years sex experience with diffrent girlfriend
maybe i just cum on sex around 10% and the other 90% cum is using HJ even i rarely feeling satisfied with BJ
at 1st i didnt know that this is a problem
even in 10% of the cum i get its all in 1 position and its WOT
i never can cum in MOT/other position
so last week i when im starting to having sex with my new girlfriend
the samething happen again and my girlfriend tell me im Faping too much and she say thats why i cant cum if not using hand
at first i didnt believe it at all ,but i try to find some information and i realize maybe i suffer a death grip
i usualy faping everyday or at least 5 times/week while waching porn or before sleep and always in the same pattern while sitting in front my pc

so am i 100% suffer a death grip?
is there any cure for my problem?
i really want to enjoy having sex like other and i hope i can seek help from here
sorry for the long post and my bad english
Thankyou

 

yeah now im trying to reboot my self also
even if i relapse ill not using death grip to M again
i read from this curedeathgrip plan A that i need to use lubricant or fleshlight when im M is really helpfull?
any guys have information about that?
i need to change how i M from now and not abusing the death grip again

yes its stand for Man on top and women on top
thats how we say it in my country

i hope my sensitivity can be back to normal
i really want to enjoy having sex and can cum in other position like doggy/missionary