What do I do?

[Jameson9]

So over the summer I found out a girl really liked me, but I didn't have feelings for her till a few weeks later. Those feelings eventually subsided, but are back now. Since then she has found a boyfriend. My question is: do I tell her how I feel, or just leave it alone and let her be?

[Lukas1999]

At the moment she has a girlfriend. If she seems to be very
happy, I would leave her alone now. You just can't destroy a
relationship. If they both brewk up, you can try your best.
Just wait or leave her alone.
There are enough girls all around the world .

[brandon9]

Don't fuck with it. I did that once, basically had an undeclared affair of sorts with the girl, and even though I knew I was better for her and I wanted it, I still felt bad I was putting her in the position of being stuck between two people. Not that I gave a shit about her boyfriend, him and I weren't exactly friends lol.

Just don't put her in a bad spot. She may hate you for it later, or you'll hate yourself.

[ska8er]

Let her b for now-her relationship with
her boyfriend may not work out and then
u can come back in and ask her if she wants
to pick up where it stopped before only if u
don't find another crush by then.

[jamie_n5]

I think as long as she has a boyfriend now you need to back off. If they break up or something then you could go ahead with it. You may find someone else soon too. Most people go through a few relationships before they find that right girl. Good Luck.

[Croconaw]

You need to wait until she is single. She has a boyfriend.

[lliam]

My question is: do I tell her how I feel, or just leave it alone and let her be?

no. just try to get to know her better. Everything else then is self-evident.
In one way or another