<human>: Condense the text into a few key points

I am bisexual, but when I started 'dating' at sixteen, I have only been with other girls. In a way, girls are just easier for me. 

But tonight I am going on a date with an old coworker, and I'm worried I'll somehow make myself undesirable to him. I'm not exactly the girliest. I have a sort of crass humor that offends a lot of people and I, for the most part, don't care about my appearance other than making sure my hair looks decent and my clothes are clean and match. Stalking his exgirlfriends, he had dated only blonde, skinny women before me. I'm... a chubby mixed girl, so it seems hard for me to compare. Even though he was the one that pursued me, and continues to tell me how cute he thinks I am, I'm still very self conscious.

I guess my question is, how can I make this date go over well? How do I come off as less awkward than I am already?
<bot>: Bisexual girl going on a date with a guy for the first time, seems to be way out of his league. Also, as awkward as awkward can be. How do I make the date go over well before I embarrass myself?