Problem in relationship. Psychologist?

Hello I have been married for last 7 years. Initially all was well. But as time went by, i noticed my husband neglecting me emotionally n sexually. I used to cry n complain n he used to assure that he will make things right. This became a cycle. Sexual contacts went from once a week to once a month n then 2 year abstinence as he was having erectile dysfunction that time. Last year we decided to plan for baby. Then also, we had contact on day of ovulation only. We didnt concieve even after trying artificially. He has no erectile problem now n sperm count is perfect. As i decided to give up trying for baby, our sexual contact also stopped. This time i gave my husband a last chance to make things better. He wishes to seek medical help as he says he loves me but maybe he forgets or relationship isnt on his priority. My question is which type of specialist can he counsel? Do we need psychiatrist or psychologist? Pls help