Q - Falling in love could also cause great disappointment and pain, HOW CAN I PREPARE MYSELF SO I DON'T GET HURT THAT MUCH?

Q - Falling in love could also cause great disappointment and pain, HOW CAN I PREPARE MYSELF SO I DON'T GET HURT THAT MUCH?
A - 
Don't think of OWNING your beloved all for yourself.
It will NEVER happen.
There will always be other men and/or women to share your sweetheart with.
Laging may ka-share ke yun ay nanay/tatay, kapatid, kaibigan or --- brace yourself --- another sweetheart/playmate/ friend with benefits, etc NYA (na siempre secret from you)! Or sports, hobbies, interests, advocacies, religion, etc ----and all the people your loved one shares those interests with.
HINDI MO GANAP NA MAAANGKIN ANG MAHAL MO!
Yun lang mayron kang part/share sa kanya among the planet's 7 biliion other people, magsaya ka na!
AND:
Huwag mo na ring ibigay sa kanya ang buung-buung puso mo.
Kasi sa laki ng puso mo, hindi nya yan kayang punuin mag-isa.
Mai-stress lang sya --- at ikaw din.
Magtira ka ng pag-ibig sa nanay/tatay, kapatid, kaibigan, interests, religion, etc mo!