why don't I listen to my own stories?

[Dom R]

..."he risks catching something-possibly life threatening."

That, is actually a perfectly valid reason (of many) to get married. Actual "safe sex", as opposed to what the media claims is "safe sex".

So, no reason to knock that, i think

I think you already have mentioned the answer to Nikki's question, on "how much longer..". that would be the "3 months" in your agreement, right?

I wonder if I am just being used as a bandaid while he continues on his quest to find someone else.

Being in the gray area of not knowing, can be horrible. I can certainly empathise with that.

If his words are to be believed, it doesnt seem like you are in that position. And overall, I think he has been fairly truthful to you. he has told you that he intended to date other women, and he did. he told you that he was done with that. and his actions up until now seem to back that up.

He may choose to just have a quiet weekend to himself. to compare and constrast everything. If he does... that's no reason to get all worried. In some ways, it could be a very good thing.
Having him get in touch with himself, for himself... rather than focus all his energies on chasing after other people... could be a very good thing, dont you think?

Hang in there. Enjoy your class. Have fun getting in touch with YOU

PS: and as Nikki implies: definately dont cancel your saturday plans on his account, if he suddenly decides to call at the last minute again. To expect you to just drop everything for him, after he didnt have the consideration to plan it with you first, would be rude on his part.