My ex girlfriend of 4 years cheated on me because I was not too sure about being serious with her...

Hi, I am 28 years old and my partner was 24. My ex girlfriend was also in therapy and she often thinks of herself as a victim and has a hard time coping with her feelings. We dated for almost 4 years, we always have been very confident in the relationship and we never ever had any big fights. Our relationship was amazing and she was an amazing partner. She also was also very very insecure all the time. She always was afraid that I would leave her but I always was very patient and I made sure to show her how much I appreciated and loved her. <br><br>Then, I had to take some time to think about my life because I turned 28 and I was in a crisis. I was not sure if I still feel the same way about her. If you ask her about what happened, she would say that I dumped her and then came crawling back. That's not true. All I said to her is that I need to figure out my life. She took it as a breakup. <br><br>So, she started dating other guys. And she got pregnant. And then she told me she was pregnant with my child. I was so happy. But she revealed to me that she actually cheated on me with other guys and she actually does not know if the baby is mine or not. She told me that she was so hurt and she wanted me to feel as much pain as possible. She told me that the only way that we could work things out was if I accepted her child as mine, because she was not going to do any dna tests.<br><br>I can not even begin to describe how hurt I was. But I also knew that I still had to be patient with her and help her to deal with her emotions. I told her that I loved her too much, and because of that I was going to accept her child as mine no matter what. She was so happy and she immediately broke up with the other guy and we started to work things out. <br><br>But as time passes... I am not happy with her at all. I am just faking it at this point. I do not trust her, and I hate her for what she did. But I have to be the bigger person here because I know that she suffers from mental health issues. I feel like I am being held hostage to her insecurities and mental disability. I have to keep being the good guy here because she is not as strong as me. It hurts because I feel like I have no power over my life and my decisions because I have to be considerate about how she will react if I change my mind about being with her. <br><br>Please advice me on how I can approach this in a more level headed manner.