Don't really think its the gambling that causes relationship breakdowns, its when partners or family members are kept in the dark or deceived, which breaks the trust that's so essential in any relationship. It's up to us to make informed decisions, to be self-aware of our behaviors, and to ensure we're not crossing lines that jeopardize our relationships and personal well-being.
Meaning to say that there's a problem with handling the situation in your gambling activities, it can spark the problem and may affect your close
relation with your love ones.
Of course, if a gambler is immersed only in gambling, he will become alienated from his close ones after a while. But even sink in gambling the relationship can be kept in right position, it will basically depend on the gambler. If he gambles regularly and gives time to his relationship regularly then it will not have any negative effect. But what happens most of the time is that if someone spends more time than usual on gambling then he will be irregular in his other areas and some will look at him differently so he will fail to maintain his relationship.