I don't know what to do

My SO and I haven't been having sex very often and when we do its just boring sex so the other night I made a big effort and did something I wouldn't normally do as I'm a little confidence shy :( so I gave him a blow job and teased him he loved it went wiled he everntually came then I left it for a while to let him build it up again, then I decided to help him out so I was helping him get hard and it just wasn't happening It only got him half way he eventually just rolled over and said not tonight babey it's to hard for guys to get hard after an orgasm :(