<human>: Can you condense the text into a few key points?

My girlfriend and I are high school sweethearts and have been dating for a little over 6 years. She was my first and, so far, only girlfriend. When we first started dating, I was 15 and she was 16. We dated the later half of high school then went to different (albeit close) colleges. We've recently graduated college and moved in together and are trying to start our lives together.

I love this girl very much and we work very well together relationship wise. As with any relationship, we have rough patches, but we've never separated or stayed angry too long. 

However, there are a few problems that have cropped up in our relationship that have concerned me for sometime. 

First off, we don't really have the same interests or hobbies. This isn't necessarily a deal breaker as we usually just compromise, but those tend to be few and far between. Furthermore, we don't really think the same way. While we do agree on most points, I tend to see things more analytically while she sees them emotionally. These differences have started to weight on me over the years. I'm worried that being so different will ultimately hurt our relationship.

Secondly, (and I'm sorry if this sounds offensive) I don't find her quite as attractive as I once did. Over the course of our relationship, she put on some weight (not a lot, but noticeable), which has started to turn me off. I've tried explaining this to her (gently, obviously) but she seems reluctant to change and thinks there's nothing wrong with her. I'm afraid this may continue and it makes me worried both fer my view of her and her health.

I've wondered about ending the relationship and trying to move on, but I don't know if I'd even have the strength to do so. I still love her and we have a lot of history together. Her being my first and only relationship doesn't help either. I wouldn't even know where to begin looking for someone else, or if anyone would even be interested in me. I'm not necessarily the most outgoing person, and I have a hard time meeting or finding new people. 

Any advice?
<bot>: Been dating a girl for 6 years and have become less interested/attracted to her over that time. Wondering if I should try to end the relationship or fight through the problems.