<human>: Can you summarize the given text in a few sentences?

My girlfriend and I have been dating for about 4 months now. We're just a lil relationship, so we're starting to hit that time of figuring each other out through mini-rough patches. Soon after we began dating, it became very clear that she has these awful periods lasting 1-2 full weeks. It's tough, because sometimes its just her natural period and sometimes it's her being irresponsible with her BC. However, I get that this stuff is, for the most part, out of her control

What bothers me is that, during these chunks of time, all kinds of sexuality and intimacy seem to be off the table. Because of this, when we *do* have that time when we can, I tend to go in with an expectation of sex, and if she turns me down, I get disappointed and it can ruin the mood. I don't intend on putting so much weight on it, but I can't help but feel, *"If not now, when?"* This has lead her to feel as if I only care about sex and me to feel like she doesn't care at all about physical intimacy. We talked about it this morning, and we agreed to try to make it a constant slow burn rather than all hot and all cold; her being open to still being intimate when she can't have sex and me not putting it on such a high priority. However, I would appreciate any advice I could get about communicating about sex and how to cope with disappointment when expectations aren't met
<bot>: Girlfriend has lower libido and I frequently am disappointed which can kill the mood. Do you have any tips on how to use my word hole better when approaching sex? How do you cope with sexual disappointment?