<human>: Can you succinctly summarize the text in 1-3 sentences?

I started dating my best friend. When I began doing so I was wary that I would want to remain single through the rest of college, but I thought I made up my mind and decided I wanted to date her. Recently those feeling have been coming back, and I feel bad because we tell each other we love each other but I am starting to no view her that way anymore. She has liked me as long as I have known her, and I feel bad for dating her and then deciding that it is not what I want. What makes it worse is she is really depressed right now, and I seem to be the anything that makes her happy and I don't want to leave her now, cause I still very much so care about her and her feelings. She starting seeing a psychiatrist. What do  I do? what makes it worse is I started crushing on this other girl, and I consider my self a very loyal person, so I would never do anything to hurt my best friend but I am left feeling like I am stuck between the new girl, and not wanting to tell my friend yet cause of her mental health. Also does anyone have experience remaining friends with people you dated cause I don't want to lose my friend or for her to feel out of place in our friend group, and stop hanging out with them ahhh.
<bot>: Best friend has feelings for me, I end up dating her. I lose feelings but she is depressed right now, and I feel bad about it. Need advice.