Love anything that lives--a person, a pet, a plant--and it will die. Trust anybody and you may be hurt; depend on anyone and that one may let you down. The price of cathexis (letting something or someone become important to us) is pain. If someone is determined not to risk pain, then such a person must do without many things: having children, getting married, the ecstasy of sex, the hope of ambition, friendship - all that makes life alive, meaningful and significant.
Move out or grow in any dimension and pain as well as joy will be your reward. A full life will be full of pain. But the only alternative is not to live fully or not to live at all.. The attempt to avoid legitimate suffering lies at the root of all emotional illness.
M Scott Peck, The Road Less Traveled