Yes I agree with winter, it would be better to have more details before advising... incase you're unwilling to share though, here's what I think so far;
Physical flaws (stretchmarks, scars, etc) can never be a deal breaker. Very few people would then be in any type of relationship. Deal breakers are deeper than physical traits and are present because there is no way for parties to compromise. i.e. Abuse, monogomy, marriage VS no marriage, kids VS no kids, etc... Those are typical deal-breakers.

Would I be upfront about not being emotionally available and uncomfortable with sex? Depends on "how" upfront is actually upfront...

Cultures differ, here we generally get to know someone socially before going on an actual date, its not common practice for 2 complete strangers to go out to dinner, which works well for many reasons because you get to know the person some before making up your mind about anything and encourages friendship to blossom before love...

Anyway my point is, if it were me, then the guy would already know by the first date that I'm not a touchy feely emotional type, or whatever, and it would be an easy subject to bring up. If I didn't know him from Adam? I'd wait till I got to know him a bit better. And I would only mention the intimacy thing if I thought the relationship was definitly heading in that direction.

My unsolicited advice to you however is this: You don't seem ready for a relationship. You admittedly do not know how to set boundaries and communicate your needs.

Say if a man were trying to get intimate with you, and he was really into it, and didnt notice your expression or demeanor change... he's not a mind reader is he? and you said you can't say no. What if you 2 have sex? is he then guilty of rape because he wasn't able to read your "no" reaction accurately? I foresee huge complications and possible danger in the light of the information that you are unable to communicate needs and wish others to read your reactions and behave accordingly.

I suggest you seek some therapy to help you with your communication problems, and maybe even with your intimacy issue if that suites you. Because once you have firm guidance in these areas, dating will be less complicated for you and the person you choose to date.

Bless your heart, I think love is for everyone, and I don't think you're creepy at all. I do hope this response is received in the helpful spirit it was sent