Bringing simcha to another Kallah or Chosson, even though you may be crying inside is one of the best things you can be doing for yourself. Go to simchas. Feel the simcha of the chosson and kallah, be genuinly happy for them. Overcome that ache inside of you when you see younger people get married. Know that when its your time, you WILL be under the chuppah.
In the meantime, if you show Hashem that you are so happy for others. Like you mamesh feel it in your heart. Hashem will look at you and say.. “Look, she is so happy for others even though she has not yet found her zivug. Now I am going to give her something to REALLY be happy about!”