To be happy and content

I'm only 22 years old and I already feel like I have no idea who I am, where I want to be, my likes/dislikes. I feel like I'm hitting a dead end being in the same relationship i've been in for 8 years. We have a child together and I have been happy up until now. I tried explaining to my significant other that I have no idea who I am as a person and that I want to learn more about myself before committing myself forever. Is that so wrong? I've never gotten to experience life on my own because I started a relationship at age 15 not knowing what was to come! Don't I have the right to want to be single? But then again I feel like I'm abandoning my family and what we had. Plus my boyfriend says I'm just making up an excuse to break up with him! HELP...I need advice.