The (24m) girlfriend (23f) experienced sex with another guy and I’m feeling extremely guilty

The situation is extremely hurtful because me and my girlfriend recently shifted in together and points were going great, both of us had a great relationship with each other families. Now everyone is aggrieved with me because I questioned her to take a break and I' m finsidering in order to up.

We had talked about experimenting with threesomes wich turned us on a lot. We decided that we would try it twice, once with another man and once with another woman. We were really both into it. So long story short we met this guy and we both agreed to do it, after a few drinks we went house with him.

I was really turned on at first yet just before we started I started getting a bit unconfortable and then they started kissing and having sex and after a short while it just felt dreadful, I couldn' t also get hard and it had been basically the two of them having sex. It was the most embarassing point I ever experienced. These people did try a lot to include me to be fair, which usually made it even more embarassing when i couldn' t do anything.

So I tried to get over it but I just can' to, it was too embarassing plus uncomfortable for me. I' mirielle causing everyone to be aggrieved and I' m feeling extremely guilty towards the girlfriend because I was in until the last moment and he or she even asked me basically was sure before starting and I said yes. I' ve never seen her this particular hurt and our family members are both really upset plus asking me to reexamine (they don' t understand what happened of course).

What should I do? I can I actually go on in the relationship while i feel so ashamed plus humiliated by how this went that I can' to even watch my girlfirend in her eyes for your embarassment??