Don't worry la.. you are only 22 ... Still a long way to go.. When i was 22, I also don't have bf..

When the time is right, your Mr Right will just appear in front of you.. 

What you can if that really worries you.. start to join social clubs like rotaract or leos, or JCs, etc  which helps you to socialize, make new friends, and also expand your networking.. If you are a christian, then maybe join in the youth fellowships..  when u are so busy with those activities, you will not think too much...

Lastly, do pray about it.. Sure God will answer your prayer when the time is right.. ** this apply to all religion ya**

So don't worry too much.. As for your friend keep asking the question, just ignore them.. Just tell them when i found my mr right, i'll sure intro to you all..