When you hang out with your friends, do you talk about God? I'm saying serious conversations about God and your beliefs. If you haven't, why not? I know it's not a comfortable subject because, everyone has different views on God and religion.
Why not get out of your comfort zone? Invite your friends to church. Go further and invite your coworker to church. I know you've thought about it, but you don't know how.

I'm guilty of not talking to my friends about God. (Not my church friends) I'm talking about my school friends, work friends, acquaintances, etc. I never talk to them about going to church. They ask questions about my religion and I answer, but, for some reason, I'm afraid that if I ask them to come to church with me, it will drive them away.
I'm trying to get out of my comfort zone. I realize now that people really are hungry for God. The reason it didn't register earlier was because, I'm already fulfilled. I have God in my life and it took me some time to apprehend that other people don't have him in theirs. That's why some people feel like there's something missing, that they feel like their lives have come short of a certain commodity. I haven't had a chance to actually hunger for God. He's always been in my life, so I didn't realize that other people have that emptiness.
Having God in my life brings a sense of happiness. I wish this would have dawned on me earlier in life. Sure, I heard it all the time that you should talk about God to people who don't know about him and invite people to church who don't have a church to go to. But, actually going out and doing those things is different than saying you will and knowing you should.
We need to learn to share his word and not just keep it to ourselves. That's selfish. If we don't tell people what we know to be true, we're not doing our job.
God gives you chances to talk about him and invite people to church, it's what we do with those chances that makes the difference. Usually, we'll talk about what's going on in our lives and we don't even think about God. It's easy to forget about him and it's comfortable to talk about other stuff, but, you need to get out of your comfort zone and remember that God probably gave you this chance to talk about him.
Don't screw it up, you may never get that chance again. Dive into the unknown territory, what's the worst that could happen?