<human>: As the title says, I need help. I know by 25 I should be more comfortable with myself but I keep finding myself in this dark place where my insecurities are spilling over and impacting my relationship. 

I've been dating this GREAT human being (34M) since January of 2016. I find that the more serious we get, the crazier I feel. I have never really liked myself and I feel like I should be over that period of my life by now. Buuuuut, I keep hearing this little voice in my head telling me I'm not "enough" for him. He gets so frustrated validating me and I'm frustrated, too. A lot of times this spirals into an argument and has me in tears. I need advice, how do you guys quell those negative feelings when they come up? I don't want to ruin my relationship with my great guy because of this little voice. 

I'm sorry this might seem like a silly question, it's my first time posting ever and I want some insight from people who have no idea who I am, and I hope I can find that here!

Summarize the given text in a few sentences.
<bot>: insecurities keep causing fights with my s/o and I need advice or even past experiences/insight so I don't self-sabotage and lose a great relationship!