I'm 22 week and I'm feeling detached from my boyfriend

I'm 22 weeks pregnant and expecting a precious little girl😀 My boyfriend and I are very excited for our little bundle of joy on the way,We been together for almost 3yrs but lately I feel our relationship been cold I feel like we are detaching and honestly I don't feel like approaching him about the subject because in some way I feel like I'm being hormonal because of the pregnancy. Is anyone out their going through the same situation? Any advice?