Either your outside responsibilities are weighing heavily on you now -- you have too much work to do to go out and have a good time, or family obligations are trumping your dating life -- or you're just feeling emotionally closed off and unavailable. Either way, that special someone might try to get through to you and make a warm, affectionate connection, and you won't be able to respond in kind. Faking it would be the worst way to deal with this, because they'll pick up on your lack of sincerity and it'll only make things awkward!
So don't pretend warmth when you don't feel it. And don't make promises you can't keep. If you have too much work to have fun, just buckle down and get it done; don't accept an invitation for a date and then work late to meet all your responsibilities, because you'll just seem harried and preoccupied when you go out with your cutie. This transit is blessedly short, so take comfort in that. Your warm, loving feelings will probably return as soon as this trying energy passes, so don't waste time feeling anxious that this is the way it's always going to be. It's just a phase!