Can stress lead to decreased affection?

My boyfriend has recently become unhappy at work and is seeking a change of job. He's also still sorting out getting his ex's name off the mortgage on the house they bought together. Anyway, I am noticing a change in our relationship. He is not as kissy or cuddly anymore. I asked him if everything was ok between us and he said he was just stressed. I try to support him but he isn’t talkative at all. He never initiates conversation anymore and shows little to no affection. Is this normal? What can I do to help? I feel hopeless.
Can stress lead to decreased affection?
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