I tell myself the same thing, every time, after it inevitably happens. Don't let yourself fall for people, at least never completely. Once you do, you are no longer the only one in control of your happiness, it begins to depend more and more on someone else. You think that no, this person is different, things will work out and I should just go with it for once. The person appears to really care for me and want to be with me. Even if you aren't absolutely sure, it takes too much to hold up your fences and walls all of the time. You think that if you do not let them in a little more, show them how much you care, then they'll get bored and they'll leave. Who would want to be with someone if they didn't think that there were real feelings underneath? So you let it show, you let them know and what happens next? They're done. You thought they'd leave if you didn't open up more, didn't show that you actually cared but no... it's somehow the reverse. You finally let them know that they've made process, that they've won at least some little part of you and then they don't want you anymore. So now you tell yourself that you've learned that lesson for the last time, that you finally understand. You start over, getting to know people but never really letting them in, never really showing you care. Someone else comes a long and it doesn't matter, they seem nice but you know what'll happen. They talk to you soo much tho and tell you how much they want and need you and you start thinking... maybe this time he is different. Maybe it will actually be good. The walls are slowly being broken and you wake up on day realizing that this person is important to you and that you also want to be with them. So you think things are great now and you tell the other person what you've realized. Then you don't talk to them for a day or two, then a couple days longer and then they are just gone. Gone again, gone like always. Now you swear you'll never let anyone in ever again but, you know that you are lying to yourself.