Aloof And Indifferent Husband

Of late my husband remains aloof and indifferent from me..we have been married over 20 years now and i have been into spiritual activities in the last few years..we were very active earlier together and now he shows irritations on smallest of acts of mine which displeases him ..I am not much into intimacy while he prefers that way..some advise to rectify the situation and to bring some calmness and peace into our relationship would be welcome