Please help ladies!

Kristy
My boyfriend and I have been dating 5 weeks, amazing Union! On top of the world together, motivate eachother, laugh harder than I ever knew possible... 
2 days ago, we found out I'm pregnant. . .things were going so well, he claims he is very happy about it, and at times I believe he is. But since we found out, things have changed. He thinks I'm imagining it, but I'm not. Words can't describe how amazing him and I are together, and since this, it's entirely different. I don't want this to ruin things. I don't think this baby is a good idea, yet I don't believe an abortion is either. 
I don't know what to do... 
Please ladies, advice!