Almost sexless marriage

My husbad and I have been married only since March and we are pregnant with our first. We are very excited about it and can't wait to see what the future has in store for us. However we are living as almost roommates. My husband works two jobs and owns a company so he's very busy and has almost no time. So this has taken a huge toll on out intimate life. He falls asleep on me almost every night leaving me feel unloved and too unattractive to make love to my husband. This has been going on for almost four months and I just don't know what to do anymore. I'm so thankful I have a hard working husband who will provide for me and out family but at the expense of our untamed it doesn't seem worth it. I've tried lingerie, oral, toys, everything but it doesn't seem to entice him in the least. What good am I as a wife if I can't keep my husbands attention? 
The lack of feeling attractive to him makes my eye wander and setes I flirt at work and I don't want to! I am a loyal wife and will not even consider an affair but I can't make these thoughts stop and I can't get it through to my husband that I need him to show love! What do I do! Help please!!