Need advice for differing sex drives.

Hi all,

My wife and I got married young. I was 20 and she was 19 when we met in college and began dating. Our relationship started as most do, with a crazy honeymoon phase. We were physically intimate every single day, if not multiple times a day. We dated for about a year before getting married, and have now been married for 5 years. Each year of our marriage, her libido has seemed to go down, while mine has remained the same. We are now to being intimate about 2x per month, which has been very difficult for me. I have communicated this to her on multiple occasions throughout our marriage, and she apologizes and gets sad because she feels bad, which then makes me feel bad too. She said it’s not anything to do with me or her attraction to me, and apologizes that her drive is lower than when we met. I’m thinking maybe a therapist or sex counselor would be good for us, but wanted to know what others in similar situations have figured out together. Our relationship has been strong in all aspects outside of intimacy, but lately the extra lack of it has me feeling very much like a roommate especially because we have gotten into a habit of doing our own thing after work. Any advice is appreciated, thanks!