The last thing anyone in a relationship wants to think about is if it is healthy or not. Couples and even friends would rather ignore flaws to better appreciate the good parts of a relationship. The biggest things that define the health of a relationship are possessiveness, trust, and, of course, abuse.
One of the most common factors in an unhealthy relationship is possessiveness. While your significant other getting jealous about your friends may seem really cute, there is a point where the line must be drawn. If your significant other wants you to spend all your time with them and does what they can to sabotage any other activities or relationships that would take time away from them, it is likely the relationship is on the unhealthy side of possessive. Tumblr user “littlemousling” summarized possessiveness well in a post: