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

Hi All, I have been lurking here for a few months now and I have finally decided to post my situation and ask for advice as I feel like I am not even sure where to start with dealing with the emotions I am feeling lately. I have never been in a situation like this before.
I 23F and 23M have been dating for around 4 months now. When we first starting seeing each other we would have sex or at least mess around every time we hung out (3 - 4xs a week). Around the 3rd month he started having issues with staying erect during sex, or foreplay.

Cut to now. we only have sex maybe once every week at the moment. I know that this has only been happening for a month, but to me that is really hard. I have a relatively high sex drive, and it really is one of the things that makes me feel intimate with a SO.
We have talked about it a lot and I know he is currently really stressed due to trying to change jobs and having to study to qualify for the job he wants to get. He also has said that he is putting a lot of pressure on himself when we try to have sex which makes it hard to get into it because he doesn't want to disappoint me. He's just never in the mood anymore. The 1 or 2 times that we have done it recently have just been randomly in the middle of the night--maybe he just feels less stressed then? Anyone else experience this?

I have told him that sex is an important part of the relationship for me and he is asking if I can just be patient while he works through these things. I guess I am just having trouble with this. When you constantly get rejected for sex, it gets more and more hard to initiate or try to be intimate especially since I don't want to be the person putting more stress or pressure on him. It's taking a bit of a toll on me emotionally and taking a hit to my self confidence more than I thought it would.
<bot>: Having issues with not having sex with my SO. How do you know whether a situation is temporary? At what point do I walk away? How do I get over the feeling that it's me?