So you are not the “outgoing type” or would rather curl up with a book on Friday night and not engage the world. Or maybe you are the “life of the party” kind of person and hate sitting in silence. Both people are created by God and uniquely wired to have a way to “charge up their batteries.” But when it comes to engaging those around us for Christ, our sole purpose for doing so should not be to only get something out of those relationships. We should also be looking for ways to give.
For though I am free from all, I have made myself a servant to all, that I might win more of them. To the Jews I became as a Jew, in order to win Jews. To those under the law I became as one under the law (though not being myself under the law) that I might win those under the law. To those outside the law I became as one outside the law (not being outside the law of God but under the law of Christ) that I might win those outside the law. To the weak I became weak, that I might win the weak. I have become all things to all people, that by all means I might save some. I do it all for the sake of the gospel, that I may share with them in its blessings.
As a single adult, you need to get out there and meet people for the sake of the Gospel! Not just to have someone to party with or call to watch a movie, but to meet lost people and show the love of God. These relationships are not for the purpose of dating, but for the Kingdom. But notice what Paul says, he does not do that because everyone is converting due to his efforts. He is doing this so that SOME MAY be saved. Just because you had lunch with a co-worker and there was not a baptism that followed, doesn’t mean you should give up on engaging those around you.
What is at stake is too great for you as a follower of Christ not to make all efforts to share the Gospel. If you don’t have a relationship with the Lord. Single adults have great opportunities to be flexible with their time and engage others. Single parents have connections as well through their family that otherwise some may never have to reach people. No matter where you are at as single adult, sharing the Gospel needs to be close to your heart daily in order that some may know Him.