how do i find out whats in my chart if im a gemini??

Well I am a Gemini female I have been in a 5 year relationship over a year ago with a Cancer male….I loved him very much I saw a big future with him but 4 years into our relationship he started changing acting weird very rude to me made me feel like I was the last thing on his mind being very selfish…which would frustrate me a lot…I had feeling he was being unfaithful to me but I just didn’t want to believe it so I was in denial for months but I finally got the courage to stand up for myself and I ended our relationship…we had a great run but he was lying and cheating on me I don’t tolerate that plus he would deny it but I had evidence they are great manipulators ill tell you that …. Couple months later I started dating again and I starting falling for the guy and I find out again that I in a relationship with a cancer … he did have the positive qualities my X did but I was scared to face the negative ones again he had which he did…they are not reliable they say one thing and do another or if something bad is happening in their life they shut ppl out so I never know what is going on? I start thinking did I do something wrong it just drives me crazy…I really wish I knew how to understand them…I am so nice caring will go over and beyond and I feel like they never appreciate me …. And I don’t know why I cant just let them go I just get so attached and its hard to let go and both cancer men let me go asif I was nothing to them…what is there to do to make them realize that you made their life better and tried to bring the best out of them???