Lots of people, who want to get married, do so in their 20s. If you are in that age range, then you can expect to see a lot of weddings.
Kind of like now, in my mid-50s, I see a lot of grandchildren.
If you want to get married and your boyfriend does not, you'll have to make some decisions. One of those decisions might involve breaking up with him and looking for another boyfriend who shares your life goals.
Or, hang on for another 5 years and hope he comes around.