Boy trouble =[?!

Boy trouble =[?

Me and my boyfriend have been together about 5 months. In the beginning, [[first 2 months probably]] He would do anything to be able to see me. He would always put me first. He used to say things like "If you ever broke up with me I would cry for days", "No other girl has ever made me feel like this, your so perfect for me" or he would just call to see how my day was going and see what I was up to.
Now he almost acts as if he's tired of me. Im so scared that he really is. He still always tells me im beautiful and that he loves me but now its like im almost last priority =[ I always put him first, if there might be a way I can see him I will find it. But lately he has just seemed tired of me. Why is he doing this? Its like in the beginning stages he was really really attached to me but now he isnt as much at all! I hate it. What can I say to him to help him understand how I feel. Please help, I dont know what to do!
Thank you.

Sit down and talk to him and see whats been going on and see if there's something on his mind and if he wants to talk about it but if there is and he doesn't want to talk about it make him because it could be something serious not to scare you or anything here. But I've been with my fiancee for 4 months so its less than you and your boyfriend and we hit a rough spot and I sat him down to find out why he was acting so weird and it was because he thought I wasn't putting him first even tho I was and now that I pay all my attention to him and plan more things for us to do on the days were together were better so maybe it can work for you...if you need to talk me just im me my im is in my profile....