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

So we've been dating over a year, she's great, and nothing in our relationship has changed. We see each other about once every three weeks because I'm relatively close. Since college started I've been working out more and been more social. All of a sudden I'm fearing a long committed relationship. 

I still love my girlfriend and she has done nothing wrong but I see no end to the relationship and as an 18 year old that scares the hell out of me. I'm afraid of hurting her if I ask for a break but I'm afraid of committing for a long time. What should I do or evaluate?
<bot>: I'm an 18 year old guy who loves his girlfriend but doesn't want to commit or hurt her, what should I keep in mind?