Sorry guys, i just need to vent!

I have been dating a guy for a few weeks now.
I really like him, but I don't know how to tell him about my MG.

My ex fiance broke up with me a few months ago because MG was taking a bigger toll on him than me. haha

I've been able to keep it from him, but last night after dinner and a movie i was exhausted - i began to slur my speech. I know he noticed, but didn't say anything.

How do you deal with relationships?
what helps?