bail out on
leave someone high and dry
desolate
leave someone holding the bag
pull one's head in
fall away
throw in one's hand
give up
forsake
leave someone in the lurch
apostatize
ditch
tergiversate
walk away from
prevent
resign oneself
apostatise
shoot
jib
give over
leave alone
get off someone's back
throw in the towel
desist
kibosh
reprieve
deny
fold
self-destruct
let the matter drop
self-destroy
cut bait
back out
bury
evacuate
succumb
screw off
discharge
shelve
forgo
dispense with
foreswear
drive away
relinquish
knock it off
forego
pack in
pull the pin
waive
desert
get out
hang out to dry
take against
come round
throw over
chuck in
absent
punk out
give someone a break
alienate
omit
throw up
leave the nest
disinvite
bite the dust
cut out
shrink back
quit
cast off
back down
bug out
swipe left
want out
leave behind
release
build a bridge and get over it
walk off
walk out on
cheese
ungrip
strand
eject
chuck away
punt
keep from
renounce
unglue
call it quits
send away
detract
unhug
put out to pasture
cease
unhate
put one's foot down on