My girlfriend and I, both 25, have been together for almost 4 years now, living together for about 3 of those. Last year, I left my career to make a change, and went back to school. She also went back to school (law) at night time.
The problem is that I feel she has become distant from me, and I am worried about loosing our relationship.
One part of the problem is both of our schedules make it very hard for us to spend much time together. I do, however, make plans whenever possible, to treat her to dinner, take her out, or to do whatever I can to show her how I feel.
Another problem is that she is slightly ahead of me right now, in terms of financial responsibility, education etc. I used to make a very good living, almost twice what she is currently earning. I was laid off, and decided to change careers. I never went to college, whereas she has a degree from a good school. I am now studying, and have a very well thought out game plan that will give me a great career. She totally understands/supports this, but she also feels like she already has her stuff together. All of her freinds are getting engaged, while she is waiting for me to get up to her level.
Another big problem in our relationship:
Since she started school, she has spread her wings (which is great) but I am often left behind. Unfortunately, I work on weekends, and it prevents me from taking part. On haloween for instance, she went to a party at one of her (guy) students house, and took a singe girlfriend of hers. Then, just a few weeks ago, there was a gathering at a bar for the students, and guests were invited, but she thought it would be awkward for me to go. I got upset, she said I could come, and then changed her mind again a few times. Finally she said I could go, just to make me feel better. I went, and ended up chatting perfectly normally with this guy for a while. She was totally pissed at me for a week about it. She says it was just that no one else really was going to have there boyfriends/girlfriends there, and that she just wanted to unwind with her freinds, without having to "babysit" me.
Anyway, this guy, it turns out, has become her best friend at school. When the group goes out drinking, they always hang out together, talk etc. They communicate almost daily via email. I get jealous because I see she never mentions me in their conversations, like when she says she is going out to a new years party, but never says "With Ryan" etc.
I, of course, feel jealous, justified or not, and have blundered my way through communicating this to her. I know her very well, and I know she would never cheat on me, that is not really the problem. I am just afraid she is getting closer to someone, other than me, I guess. We have talked it over, she says she loves me.
She has also said that she does feel like our spark has gone, that she is upset about us fighting, and that yeah, she might have had a crush on this guy for a brief time, when we were fighting, but not at all anymore. Unfortunately, he is 1/3rd of a study group with my girlfriend. I told her that was fine, but I wanted her to stop talking to him about non-school stuff if she wanted to keep our relationship.
I guess I am just wondering what you all think about this. Do you think that I should just give up, and that we might just not be the right people for each other? Should we just cut losses and move on

(( Or what else can I do? I love her VERY much, and really do not see myself with anyone else.