<human>: Can you provide a brief overview of the text?

Hi! I'm really glad I found this subbreddit because I'm trying to solve a problem I've been having for a long time, and I'm hoping to find some advice. There are a million details I could talk about, but I think I'm going to keep this post fairly down to the point. 

I've been with my boyfriend for 2.5 years now. I've become extremely dependent on him - I rely on him to drive me to work and school because I don't drive, and there is no public transit available in our neighborhood. We are also very financially bound, as we recently bought a house together, and he owes me a large amount of money (which he pays me monthly). He has asked me about marriage multiple times. 

We've had a lot of ups and downs in our relationship. Sometimes I can imaging staying with him for life - but other times I really wish I could break up and move on. I've had thoughts of breaking up with him on and off during the entire duration of our relationship - I have quite a strong internal battle over this. He has asked me about marriage multiple times, but I absolutely won't let myself marry him because I'm terribly afraid that I would regret it. I didn't have much experience with relationships prior to this one, so I don't have much to compare this to. I feel like I need to meet more people and explore life a little more.  **I just can't help but wonder if I could find someone better - someone more attractive and ambitious - I think this is my biggest problem.** But then, I worry that I might regret leaving him. We've done a lot of great things together, and he is definitely my best friend. 

Is it normal to have thoughts like these? Should I seriously start planning to break up with him?
<bot>: I've [23 M] been thinking about breaking up with with my boyfriend [28 M] on and off during the entire duration of our 2.5 year relationship. Should I seriously start planning to break up with him?