Friends with benefits.

I am a girl who works in a man's trade. I am the only girl at my place of work amongst about 50 guys. I love my job I get along well with most of them. I'm truly happy.

I have one coworker who's relatively close to my age (I'm 20 by the way and this coworker is 22). Anyways. He's pretty cool and we started hanging out outside of work. Became my little gym buddy, went fishing together, went hunting. Fine. Then one day he was like it's my buddy's birthday we are just having a barbecue and he invited me. I was like yeah sure why not. It was kind of like a street party at the end of a cul-de-sac street. It was small. Maybe only 15 or 16 people. But it was cool. I remember going into the house to help get some more drinks. He was in the kitchen too getting more plates and condiments. I went to head back outside and he said hold on a sec. So I did thinking he needed me to grab something for him. And that's when he kissed me. Forgot about the drinks and condiments, made out right there in the kitchen for a couple minutes. I was taken aback came to my senses and went back to getting drinks and went outside. Facing him at work the following Monday was so scary. He acted like nothing had happened so I didn't say anything because I figured maybe he was buzzed and didn't remember. I was wrong. We still hang out outside of work but since then we have had sex probably 4 or 5 times. Never at work of course. Always on our own time. I don't feel used which I like. He doesn't text me every day he isn't all up in my space 24/7. I like the relationship we have. We're being safe. But now it's been probably 6 months of this FWB thing and the other day I let my kind wander and I totally thought to myself that I would be okay carrying his baby if it ever happened. I mentioned it in a light kind of way and he was like heck we would make a cute kid and said I would be a good mama and that he would stay right by my side. I'm obviously not trying to get pregnant and I'm not about to start! But is it okay having this relationship? I'm happy, he's happy. Is it wrong?