Stuck and confused

First off, I am a young mother (20) and my bd is 21. Our son is 8 months now, and I’ve lived with my bd and his family for about 2 years already. Never had problems with them, they welcomed me into their home with open arms. Learned he is VERY family oriented. I was young and dumb so our relationship happened too fast but we both communicated very well so we got through everything. Through that experience, I became very confused. Our ‘spark’ just isn’t there anymore and I find myself waking up angry every single day. I’m just becoming bitter and I hate it, I also don’t want to be so angry with him either because I could see the effort that he does put in for my son and I, and it all comes from the heart. I always try to cut him a break because he is the only one that works (family business), I try to let him have his weekends with the guys or just relax when he gets home from work but then I find myself still so tired, frustrated, just not being myself anymore at the end of the day. Every time I try to leave him to care for the baby while I shower or clean, he hands the baby to his family because they will happily take him (they love him and I’m very grateful for that) but he gets to have his free time because his family helps out. Overall my point is, he’s a mommas boy, daddy’s boy, family boy and that’s great so am I but to an extent.. I’m definitely not trying to keep him away from that but I just don’t know what to do to stop feeling this way, or what my problem even is. This is probably so confusing but that’s exactly how I’m feeling. Just overall frustrated and it’s pushing me to just want to run and leave. I just need advice or just to be listened to. I would talk to my bf but I feel like it would just be the same conversation repeating and I could tell he’s getting fed up with it. There’s only so much I could say and only so much he could understand. I just feel so stuck.