<human>: My girlfriend and I met in High School and decided to continue our relationship into college. Most of our relationship has been long distance. We have handled it well visiting each other when we can and talking often. We frequently discuss a future together. Recently I have been feeling uncertain. This summer she is away hiking and largely out of contact. I should mention that she has been the only person I have ever been with. The combination of missing her and being curious about what it would be like to be with others (not just sexually but relationship wise too) has made me unsure of our relationship. 

I spoke with her recently when we got a chance and said she would be ok if I wanted to take a break though she would prefer we didn't. As for our future together after I complete school I will be in the Army and will be moving around the country. I also plan on doing an additional year of school which will result in her graduating a year before me. 

Our relationship has had its ups and downs but for the most part is a happy one. Sometimes I feel as if it has caused me to miss out but I enjoy the time we spend talking and texting when apart. There are times when the stress of the relationship and school/life has caused us both to break down a bit. I am concerned not just about myself but if this relationship is a hamper on her success and well being.   

 I don't really know how to convey my feelings and in text and this may not make a lot of sense because I'm sleep deprived and preoccupied with thinking about it. 
How should I determine what the best course of action is? What would you do? Do you have a similar experience?   

Any help or questions are appreciated.

Can you give me the gist of the text in a nutshell?
<bot>: LDR with girlfriend of 2 years who is the only girl I've been with and I rarely see. Unsure if I should power through or take a break.