No wonder you feel depressed: married for only 5 years, with a substantial sexual activity problem for the past 3. When a "high sex drive" partner (you) is married to one with a "lower sex drive" then real matrimonial problems can occur and fester. When women are deprived of enough sex they often suffer from resentment, frustration, anger, and low self-esteem. The big problem is that the "low sex drive" partner is unlikely to alter his frequency and desire for intercourse with you over time, unless there is a treatable underlying medical problem (eg depression), a psychological issue (eg erectile dysfunction), or if he takes medications (such as for high blood pressure or depression).
Sexual issues are a major factor in eventual major matrimonial dissatisfaction. The fact that you are fighting over sex, and such arguements can become quite bitter and personal, suggests that you could well benefit from marriage guidance counseling, to clarify the long-term outlook for sexual gratification in you marriage. Afterall, you love each other dearly, so it's worth the effort!