<human>: Hello reddit, 

Basically, I've been in a relationship for the past 4 years, since the first year of university. It was the first time I've really been in any kind of relationship, as my confidence was really not great before uni. Since then, we've moved into a studio flat together and thing's have been going, well, fine. Objectively, we're a great couple, we still go out, have fun together, and so on. 

I still have doubts though about what I want in my life at the moment. After undergrad, we moved to a different city together for me to start medical school, and she started a PHD, and we properly live together in a studio apartment. Next year I qualify, and I might have to go anywhere in the country for a job, and I don't know if this is what I want the rest of my life to be like.

I find myself thinking a lot about other women, and I've found that over the past few years, I've grown a lot more confident in myself, (my gf was my first kiss, relationship, everything really).
I don't want to hurt her feelings, and I would never cheat on her and objectively our relationship is great, so I'm internalising a lot of these feelings at the moment. What do you think I should do?

Can you summarize the given text in a few sentences?
<bot>: I'm currently in a long term relationship, everything's going well, but I think I wasn't ready for moving in, discussions about children, etc.