Women who give birth to boys need to expect that they'll play second fiddle once the sons are married. It seems to be - almost - a natural law - of course there are exceptions but those are few and far between.
I have 2 DS and though I know my heart will never stop bleeding about this, I attempt to make life bearable and focus on having a good time with DH (I'm very grateful to have him) but it's a lot more lonely than being a mother of DDs where the post-marriage relationship just seems to fall into place because D are easier with their own parents.
I was orphaned early in life, so when I got married I did not have parents. My FIL said to DH at the time: Count your blessings, son for getting married to a girl whose parents are no longer there.' I thought at the time that was a pretty mean thing to say but I do see his point now. Ha!
Sorry to hear about your disappointment.