Confused about the dating sites- kinda hurt, need advice...

Getting started, not my usual sub. here, I'm I my early 30's, came out about...a year and 7 or so months ago, officially, slow with friends at first ( who really were Not all that suprised )..then to family. Even stated a thank you to my friends and loved ones on FB about their support. So eventually I began sifting through some dating sites, met a few guys online ( thank God only online ), met up with 2 of them over time, in person. OKCUPID was a good place at first..until what I found out about alot of the guys in my area seem basically ( not all of them mind you ) interested in casual sex...Even if their profile says differently. The two I met over time seemed cool at first, the first one I dated, briefly..1 1/2 months approx this summer. The other one openly spoke of getting drunk, popping pills etc. "Thanks for letting me know ahead of time"...jerk. As far as relationships I have come to find out- I get invested emotionally and spiritually Way to fast. Advice I'm searching for..." how does one Not get emotionally attached to fast"? and also, of course like so many, want a good Guy to be with, Not all day or Every day, but at least for some respect. Feeling kinda hurt over the whole " I love you " line, that later leads to sex, and getting dumped. Sucks. I'm a firm believer in karma, and the Law of Attraction ( am I inadvertently attracting the wrong type, if one buys into that stuff ) ? ..now I'm single, its pretty Ok..not spectacular..I make all my own decisions to the best of my ability, some guidance is welcome of course ( Heck- I'm posting this ). Any helpful suggestions or comments are welcome. This seems to be a safe place to post this. No judgment.