Slept with my flatmate and now I'm being left out.

I don't usually ask on forums for help because I think I can tough it out but I've been getting really upset about this so I'd like some advice.
For context: I'm a really shy person, I don't talk a lot and I feel like I can't talk to most people because they think I'm strange. It's mainly due to my autism and my other mental health conditions that I feel this way.

So a few days ago, I believe on Monday or Tuesday, me and my flatmate got really drunk and decided to have sex. This flatmate is in an open relationship so it was only sex and nothing more. I've been giving her space but since then, she hasn't been talking to me and ignores me in the morning when she walks past.
Anyways, this past evening, I saw my other flatmate and her in the kitchen and I decided to join in their conversation but it feels like I was unwanted as they were just talking to each other and I was trying to join in, I find it hard to talk to people because of some of my conditions. I joined them to go to the corner shop and it felt fine then. We went out in the garden and we had a fine conversation that I was just listening to because I couldn't relate to. I did decide to talk about one thing that the flatmate did when she was drunk and she said that I was lying and how do I remember that if we were drunk? The conversation moved into the common area and I sat down next to the other flatmate and yet again, the conversation was just with both of them, excluding me. I just decided to leave because if they weren't going to try and talk to me, why bother stay and hope?

I'd just like some advice whether it's for me or the situation because I can't go around feeling awkward or sad around these people since I'm living here until my first year ends.

Reply 1

jay2013

Just be civil towards her and nothing more and just get on with your studying.

Reply 2

StriderHort

Fact is things probably will just be awkward for at least a while, this is 100% why you DON'T sleep with flatmates as it gets weird quick.

The fact you were both 'really drunk' doesn't help and there's a good chance she regrets it or even feels you took advantage and it's possible your flatmates feel the same way if it's been discussed. (I don't really agree with how men get such a larger share of responsibility in these cases, but we do)

What was the thing you tried to tell them about when she was drunk and why? the instant rebuke implies there's already been some conversation about this?

Reply 3

Zarek

Drunken sex outside of a relationship is usually bad news. Just let the dust settle.

Reply 4

Anonymous #1

Original post by StriderHort

Fact is things probably will just be awkward for at least a while, this is 100% why you DON'T sleep with flatmates as it gets weird quick.
The fact you were both 'really drunk' doesn't help and there's a good chance she regrets it or even feels you took advantage and it's possible your flatmates feel the same way if it's been discussed. (I don't really agree with how men get such a larger share of responsibility in these cases, but we do)
What was the thing you tried to tell them about when she was drunk and why? the instant rebuke implies there's already been some conversation about this?

First of all, I'm not a man, I'm a woman, I should have said that in the post. It's not been discussed unless behind my back. The thing I tried bringing up was her peeing in the corner of the garden because another flatmate threw a ball in the same corner. I was trying to share a shared memory but she did tell me she was way too drunk to remember that.