As you can post this topic here, you may have awared that there is something wrong.
Sex is a gift from God to married couples. This is such an important element between husband and wife. It is an element to distinguish husband and wife from other family members.
It doesn't matter how often it is since everybody is different. But if you said two years, I think it is too long.
I think at first your hubby was very considerate to you and now it has become a habit. You should take initiative yourself to form a habit between you and him.
Try to give you two a comfortable environment like don't let bb live in the same room (worst on the same bed) with you and your hubby. You baby is old enough to live in a separate room.
Try to touch him gently ...... etc to make him have some physical response.
A healthy couple without sex is not complete (except if anyone is ill or away for work). The intimacy will be downgraded.
I think no matter how tired a couple could be, there must be some time that they can squeeze out and not feeling so tired, not even one time in 2 years? Frequency doesn't count but at least a couple should have some.
It could be a reflection of deterioration of the couple's relationship, and in turn without sex a couple's relationship will be deteriorated. It is the issue of "hen and egg". In that case the couple should solve their underlying problem first.
Of course, without sex doesn't mean the couple's relationship is bad, it is just a matter of degree. A couple's life can be very peaceful without sex but it just stays in the level of "peace". Won't you like more intimate relationship and feel that you are "one"?