Husband has no drive sense he has been seeing his psychiatrist?

Ever sense i got my husband to agree to see someone for his depression he has no drive. My husband is 24 and i am 28, i am also 6 months pregnant with our first child. I feel wearied asking my husband for , i have had to Initiate every time for the past 4 months. And i actuality miss him starting it and begging and everything. Besides there is no real closeness in our relationship. And it has me worried that he is falling out of love with me. They started him on some meds for his depression but his drive did not start to drop till a couple weeks later. I feel hopeless with him i do not want to lose him. Advice?