I also have a lot of married buddies while I’m still single. When I spoke with a rebbe about my pain, he pointed out to me two things: 1) He asked if I could tell the difference between the people i know who got married right away or the people who needed to wait a bit first to get married. Once it happens, you can’t even see the difference.
2) In shiur hamaalos we say אֶת־שִׁיבַ֣ת צִיּ֑וֹן הָ֜יִ֗ינוּ כְּחֹֽלְמִֽים. What does it mean that it’ll be “כְּחֹֽלְמִֽים” when mashiach comes? It means that all these years of gallus will feel “like a dream,” meaning once the gallus is over, it’ll feel as if it never happened. Likewise, once you be”H get married (which you do have a bashert, as Hashem promised), all the pain you went through will also be “like a dream.”
Lemaisah, once you’re going through this hand-crafted challenge, use it as an opportunity for growth. That’s what Hashem wants us to do. This challenge combined with the current caronavirus situation is the perfect opportunity to work on your bitachon for example (which is very important in life). Of course, see how this situation has PERSONALLY affected you, and look for ways to PERSONALLY grow from it (i.e. I can’t tell you why Hashem is putting you through this nissayon, but ask yourself ways you personally can grow from it). Ask not “Why is Hashem doing this to me?” Rather ask “Why is Hashem doing this FOR me?”
Now, all you need to do is make sure you’re putting in the CORRECT hishtadlus, and then you’ll know whatever is happening is for the best, because Hashem is in charge, and He’s taking care of you. To know what the correct Hishtadlus is, I highly reccomend you check out R’ Bentzion Shaifer’s (rabbi from “The Shmuz”) seminar on Shidduchim. Everything he gets is from Torah sources and from the mesorah of R’Heanach Leibowitz ZTZL, and it really is solid advice. Hatzlochah! I wish you the very best!