Can I just say...I think this is also based on how you value yourself.
On some level, you don't think you're good enough for her, and this WILL create paranoia for sure.
Some 21 years ago, I fell for someone who I have to admit, made me feel inadequate. It wasn't anything that he did particularly, other than ask me a question that I didn't understand, and instead of just saying, "what do you mean by that?"...I chose to answer it, not knowing what I was saying either yes, or no to.
Maybe this has been my downfall, I don't know.
This little episode, mixed with my perception of who I thought he was created nothing but paranoia for me. He is only 6 years younger than me, yet at the time I thought it was HUGE! Life has proven this to be a ridiculous concept.
However, given I had fallen for him straight away, I started to get paranoid about everything...I'm too old, too stupid, too fat, too boring...too everything.
In hind sight...I know that my paranoia developed because he actually pushed me away, he rejected me despite he showed interest. He created confusion within me, which naturally - turned to self doubt. I'm 100% honest and anything outside of this (for me) is totally foreign. Lies have no foundations, so it stands to reason that behaviours based on lies also have no foundations.
So, what did I do about it? I went off and became educated, I went to university and haven't stopped studying since. Two more subjects to go and I'll have my master's degree in psych. I have other supporting quals too and THIS has given me the confidence to no longer believe that I'm not good enough. Prior to doing this, I was married to a man who wanted me to stay 'dumb' for one of a better term. He was very insecure and so passively aggressively mistreated me: not physically, just emotionally. The point is...YOU have a responsibility to yourself to feel good about who you are. Find something that will help you become the person you actually want to be. Once you become that person, you'll find that who you are underneath isn't so bad after all.
The funny thing is though...I've got all these quals, yet none of them have brought any real financial rewards. Sure, I'm a teacher but it doesn't pay well. It's a good job that gives non monetary rewards, but don't ever expect to be a millionaire being a teacher.
I made more money before I got the quals doing what I was good at, yet not truly valuing it...art! I'm now going back to it because it's my oxygen, my life support, it's what I love doing.