<human>: Provide a brief overview of the text.

Hey dudes. 

Met this great guy two months ago. A month later, we were official and exclusive. He's a kind, handsome, funny, patient, loving, empathetic, down-to-earth (omg check out that honeymoon talk) person and I care about him an awful lot. It's mutual. 

I have maaaaassive insecurities since a long-term boyfriend I thought I was going to spend my life with dumped me. Trouble believing I have worth as a person, am lovable, that this new relationship will work out, or that his feelings are genuine. I am so convinced it's going to end up with him getting sick of me and leaving me that I'm acting like a complete idiot, openly showing how insecure I am (yup, them self-fulfilling prophecies). 

He's as much in the honeymoon period right now as I am, so he says everything's fine. But I know that at some point this shit is not going to fly anymore. 

I have been actively going to therapy for more than a year but I'm still struggling with this. I was wondering if any redditors would be willing to share advice or their personal experience in regards to overcoming trust issues and insecurities before completely self-sabotaging a good relationship.
<bot>: Met an awesome dude who I greatly care for. How do I get over my insecurities so I can believe he's genuine about his feelings, believe in myself, and not sabotage everything?!