Advice wanted: Not Getting Any :(

Ugh. Its been almost 2 months since me and my bf have done anything together. I've tried multiple times but he says he's tired or isn't in the mood. Sometimes hell tease me for like a minute and then laugh and walk away. I've all together decided stopped trying to do anything with him. He still kisses me and play fight and everything else. We never fight or anything. We use to always mess around every night and sometimes almost every morning. I miss it even if it isn't as much as before. I still wish I could figure out why he doesn't want to anymore. Any advice ?