Sex...Cumming...communication

I'm havin a hard time this weekend. My boyfriend and I hardly get to see each other and well we have the weekend. This is the first time he hasn't be able to make me cum nor orgasm. The sex feels great and I feel like I'm bout to cum the entrie time we are intmate. However, I never cum. 

When he eats me it's amazing and I don't cum and when he combines eating and fingering I just feel like in in cloud 9 however I don't cum... 

It's starting to effect our moods.... What can I do or say to either make myself cum or make him feel like it's not his fault. (The past two days we have had sex 6 time-since 8 o'clock last night) 

Help please.