It's human nature that after being hurt time and time again to get discouraged. You may lose trust in guys, develop self-esteem issues and feel that relationships won't work out for you. If you want to have a healthy and happy relationship you have to change your mindset.
When you start a relationship and you begin to have self-doubt "This is too good to true." "My last relationship ended badly so this will too," you are setting yourself up for disaster.
You become clingy and making accusations where you have no proof. The guy you are with will start to feel trapped and it will cause friction between you and your guy. The end result will be a break up. You will make your worst fear come true because you are putting so much into it.
When you hang out with people who have been through bad relationships they will rub off on you. They will make you feel and think that you can't be in the relationship you want. That is why it is very important for you to chose who you surround yourself with.
If you want to have a better relationship you have to make some changes. Know that there are good guys in the world. Just because you have been hurt does not mean that all guys will hurt you.
Don't expect a guy to change his mind about you. Love yourself and know that you are girlfriend material. No matter what anyone says know that you have what it takes to make a guy happy.
Think of guys that did like you and did treat your right. Think of what is going right in your relationship instead of with the problem is. Thinking of guys who hurt you in the past and bringing those experiences into your present relationship is not going to do you any good.
Surround yourself with people you could trust and start being friends with a guy first. Get to know him as a person and time will tell on weather or not he is the one for you. Trust takes time but you need it in order for a relationship to survive. A relationship with no trust and no faith will be toxic and it will cause a relationship to break.
At one time or another everyone has been burned by someone. Then eventually they find the right person. It's not how badly you are burned it is how you get up and get through it that determines how strong you are. Remember every bad relationship means you are one step closer to finding the guy who is right for you.