There's nothing wrong with loving other people, its when we cling too hard to them and have too many expectations that difficulties arise. With regard to lay couples the Buddha said: "If both husband & wife want to see one another not only in the present life but also in the life to come, they should be in tune [with each other] in conviction, in tune in virtue, in tune in generosity, and in tune in discernment. Then they will see one another not only in the present life but also in the life to come." Husband & wife, both of them having conviction, being responsive, being restrained, living by the Dhamma, addressing each other with loving words: they benefit in manifold ways. To them comes bliss. Their enemies are dejected when both are in tune in virtue. Having followed the Dhamma here in this world, both in tune in precepts & practices, they delight in the world of the devas, enjoying the pleasures they desire. (AN 4.55 Samajivina Sutta: Living in Tune ) http://www.accesstoinsight.org/tipit....055.than.html