<human>: Hello!

My boyfriend and I have been together for a year. When we first began dating, sex was amazing, 2-3 times a day in countless positions, and he always was the one initiating it. I understand that it is probably normal for two people to have more sex at the beginning of a relationship than after settling down. 

Now, we are so much more comfortable with each other, I am at his house a lot, and we are best friends. Unfortunately, the amount of sex we have has gone down. Please know that his parents do live in the same house us him, so a lot of times he is uncomfortable with the idea of having sex while they're home. I try to initiate sex at night, or hint to him that we should do it, but he always brushes it off with "I'm tired," or "I have work tomorrow." I just feel like we are far too young to say those things. 

When we do have sex, I am always sad when it is over because I feel like I'll never know when the next time we do it will be. Sometimes I feel like he is not completely into it and he is only trying to keep me happy. This is a 180 degree turn from just a year ago, when he was always trying to get into my pants.

I don't want to pressure my boyfriend or hurt his feelings because I truly care about him. I am worried that he has too much on his mind or is stressed out about something (we are trying to save up for our own place and he starts a second job next month). I try to be as understanding as possible, but when I bring it up he shuts down completely and acts like an abused puppy. What should I do?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: BF and I don't have sex as much. I don't know how to ask without hurting his feelings, and am usually denied in my advances.