SUBREDDIT: r/relationships
TITLE: I [19 M] am considering breaking up with my girlfriend [19 M/F] of two years; she has many insecurity and confidence issues
POST: I'm in my second year of college and have been dating the same girl since senior year of high school. When we started dating, she was a goody-two-shoes, pure-as-the-driven-snow girl. Two years later and I can say I've changed in college quite a bit, but I feel like she's stayed the same. This has mostly manifested itself in the form of confidence issues, not being able to stand up for herself or her own decisions, and many insecurity issues. She has put on a little weight and she can't even bear for me to look at her naked without the lights off.

Do you have any advice on how to mend things? Do you recommend I respectfully end the relationshihp? Any help would be appreciated, reddit!
TL;DR: 
Girlfriend has confidence and insecurity issues, what can I do to fix the relationship? Should I get out of it?