<human>: Hello,

I don't want to make this too long, but basically I met my bf in college. I was 18 and had dated only a few people before him, he is my first real boyfriend. Fast-forward five and a half years and we're still together, but long distance. He loves me very much, treats me well, and has been very committed to making our long-distance work. We'll be living in different cities on the East Coast next year, but he has offered to move in with me and finish his graduate work remotely. However, I feel that I may be falling out of love. I don't feel a strong desire to live with him. I don't know why, he treats me well and loves me. I guess I'm staying in the relationship because I'm afraid I will regret breaking up with him. I have changed a lot between the ages of 18-22, as most people do, and maybe I've changed for good. I'm just so fearful of being alone and regretting breaking up with him. Maybe I will leave him and he will find a new girlfriend, and then I will forever regret leaving him because I had a gut feeling. Please help.
Has anyone been in this situation before? Did you regret your decision to leave the relationship later?

Summarize the given text in a few sentences.
<bot>: Been in a long term relationship with bf for 5.5 years, long distance for 2.5 years. Might be falling out of love, but afraid to leave because I might regret it later.