Be who you are (and start enjoying it)
As someone of similar build and perspective, I'll second Xtrencheel303.
Let me reframe the idea for you a couple different ways. You have the body of a model. Would that knowledge alone change how you see yourself and how you might dress? Our choices are affected by how we see ourself (i. e. as inadequate, as too this, too that). If you think women aren't attracted to skinny men, consider Pete Doherty and Mick Jagger Exhibit A.
Have you ever considered being skinny a strength when it comes to how you look and how you dress?
If you choose to wear things that hug your body (and top and bottom, I do), the most important thing is that they not bring out any negatives. Example: tight t-shirt or tank top and it clearly reveals your beer belly/love handles.
It's true that skinny people can have a bit of fat, but trust me, given your dimensions, you have no reason to be concerned. If you still feel lacking in bulk, though, add a blazer to the slim jeans and tee -- and make sure the blazer is a skinny cut, fitted rather than boxy and hanging off you. The blazer should not look like what a 190 pound lawyer or businessman wears to the office.
Assuming you're hetero, if you ask a woman, "Would I look better in tight clothes?" she may say yes. But if she says no, it might be because she conjures a negative mental picture and doesn't want you to look gross. Or she wants to be polite and not come across as inappropriate/too sexual. Now, if you try wearing actual clothing that you consider borderline or too tight, you might find you get looks and compliments on it. That confirmed that it was the right decision for me.
Bottom line: Topman is your best friend from now on. (They make clothes for people like me and you.) Start enjoying the benefits.