What do I do?

So A girl likes me I dated her for awhile but I didn't really like her so we separated for awhile and now she likes me again
But I like another girl who doesn't like me but ya
The guy she likes is going to hurt her emotions for sure but I don't want to say anything
How do I make everyone happy

Js tel ur ex ur nt intrstd
if u dn wnna hurt hr tel hr hw bad thngs wr whn u 2 wr 2gthr n dat u dn wnt both of u 2 b hurt agn
nw 4 ur crush, jst b frndly 2 hr, b hr 3am frnd n b thr 4 hr whnvr she needs, s u knw shes gnna gt a hrtbrk soon, prepare hw ur gnna mend hr brokn hrt agn n take advntag of d opportunity (in a gud way)
n dats hw ol of u r hapy ;)