just my opinion......

1st - if you are shy, then be shy. That is who you are, do not change or modify who you are for him. That only ends poorly.

2nd - the "physical part" - MOST guys will lose interest once they "get some". The whole why buy the cow if you get the milk for free thing is true. Stop and think about it. Either he is not serious about a LTR and is just looking for sex (in which case you do not want him), or he is interested in a LTR and he may be turned off by the fact you are not showing strong morals (in which case he may think you are not what he wants). IMO - it sounds like a lose/lose scenario)