The girl I like just started dating someone

Hi, I know this has been asked many times here, but I don't know what to do. I (19M) have liked a close friend (19F) for just over a year now. I was planning on asking her out once I saw her again, as she was away for the holidays. We talk most days, share reels, and in general we're quite close. However, now that she's back, she told me recently that she's started dating someone. We caught up the other day and it was really nice, but I just couldn't bring myself to tell her how I feel knowing she's dating someone.

Should i still come forth with my feelings anyway? I'll probably come off like an asshole given she's just started dating someone, and I don't want to ruin the friendship, but I genuinely don't think I can let this go without saying anything. I've left it too long and I want her to know how I feel. She's a really lovely person, so I'd hope that she understands, but idk.

Thank you