I thought I was the problem

I've been with my husband for 7+years now and for the last 4 I've always thought it was ME that was the problem. I've recently come across several articles talking about passive aggressive behavior and spouses that are passive aggressive. It definitely sparked an interest in me to learn more about the subject. I love my husband with my whole heart but should I continue trying to hold this marriage together if he just don't care? I feel like he's cheating on me, holding secrets, just plain and simple dont care of I'm here or not. I cry all the time and at this point I'm questioning if its even worth it anymore. I feel more alone and abandoned than if I was actually alone in life with no one.