• Playing hard to get: The problem about playing hard to get is that it is often misjudged and only gives a wrong impression to the other individual.
  For example, a person may believe that he isn't preferred or being wanted if he doesn't get the response he expected.
  
• Chasing after him: In contrast, always being around might give out an impression that you are too easy and reduces your attractiveness level, and study shows that the more rare a resource is the more it appears to be more valuable.
  This is why gold is more valuable than a rock.
  

So what should a person do in a relationship? Should she be constantly nice and risk being seen as less valuable or play hard to get and take the risk of being misunderstood? To win him back you shouldn't do both! In one article I found online "How can I love my husband again" it explained that by being in demand, people get to notice you and thus makes you look more attractive.
If in some way your husband or boyfriend found out that you're being liked or finds you interesting by most people, he'll turn out to be more attracted to you even if you're the only one providing him this information.
The appropriate thing to do when in a relationship is to be around your partner 100% and at the same time showing him that you're being hard to get by anyone else.
Showing your partner that you're ignoring those people who tries to approach you will send him two messages, the first one is that your certainly hard to get and secondly is that you really care about him.
Your level of attractiveness can be changed Compared to common beliefs, attractiveness is established by numerous factors that includes physical appearance.
Supposing that you may not be able to change your physical appearance, there are still many factors that can be done and may be controlled of.
One of factors is the "love economics" theory, which says that people may find you more attractive when they get to know that others are interested in you.
In this way you can become more attractive without actually being more physically attractive.
Knowing this will set the scene when trying to win your ex back.
Trying to go about it any other way and you are swimming in dangerous water! And something you will not want to risk with someone that could be the love of your life.