Throwaway account for hopefully obvious reasons. I [20F] have become close friends with this person over the past year, doing a lot of stuff as a duo, and it felt/feels very mutual. However, over that time, I've also developed a strong crush on them. I've never been one to really have crushes and this is perhaps my second ever that I've actually been able to identify as such, so I was really scared to mess stuff up and wanted to take it as slow as possible. In the meantime, they even got together with a work friend of theirs, though that didn't work out, and I comforted them when it broke apart after about a month. I know this sounds bad, but I really was happy for them then, and sad to hear it didn't last, and wanted to offer them comfort as a friend, not as an opportunist. Since then, I was under the impression that they may develop feelings for me as well – they've gotten very cuddly with me, we've had a few talks about relationship stuff, what we're looking for in people and our individual difficulties with the topic etc., all under the "we're friends" umbrella. Obviously I know none of that is exclusive to a romantic relationship in the making, but I was getting my hopes up.
A few weeks ago, they excitedly told me they had feelings for a mutual friend of ours [22F], and I was – though happy for them – a little disappointed. I was planning on confessing my crush to them soon, now that family celebrations are out of the way, and let them decide how they'd wanna procede, but I waited too long. Now they're in a relationship, and while I am genuinely really happy for them since I know this is something they've wanted for a long time, I am also very sad I didn't say anything sooner. What Could Have Been thoughts are big right now, but the main thing is – do I still tell them about my crush.
On the one hand, I think it would really help me move on to talk the situation through with them. I really don't want our friendship to change and they mean a lot to me regardless of romantic feelings, and I fear not telling them is gonna create this unspoken things between us that might make things really uncomfortable. On the other hand, it seems really unfair to drop this on them while they're in a relationship. I obviously don't expect them to do anything about the situation, I just want to prevent any secrets I have to keep, but it still feels really inconsiderate. I'm also scared it might make things even more awkward between us or cause them to distance themselves, though that would of course be their right to decide. I just feel like any step is one in the wrong direction right now, and I may just need more time, but I don't feel like I have any.
TL;DR: Crush got into a relationship before I could confess to them, do I still tell them in order to move on or would that be selfish and unfair?