Relationships are the best till partners have the worth of it. But, as the time passes and they start losing the love, passion, enthusiasm, spark, and respect in their relationship then, at that time they should introspect their connection with each other. And, if they find that their relationship has no future then they should immediately give a break to their respective partners.
If you find any of the signs resembling your partner's behaviour, then be sure that your relationship has no future.
It will not bother to your partner that who is keeping an eye on you or who is coming closer to you. Share the signs if you feel any of your friend is facing such conditions.