Just Venting, Sorry!

Ok I feel like I just have to vent for a hot second, sorry! So my bf and I have been together for 5 years and plan on living together getting married etc we are both 21 but trying to save up and it's just so frustrating. His mom gets so pissed at just the mention of it but my parents really don't care. We never have any alone time and since we both have younger siblings we can't even sleep in the same bed together when one of us sleeps over. I feel like I'm still in high school. All I want is to be able to fall asleep in my mans arms and be together. This situation makes me so aggravated.