We all have negative thoughts, and feel bad and are negative from time to time. First, give your negative thought, a thought. Why are you having it, really dig for an answer. Sometimes we are negative just because we are afraid of change so we tell ourselves we can't do that, so we don't try-problem solved, not. Ok, you've given it it's two seconds of glory, now you have the choice of changing some behaviour or making a decision, whatever. So let's take the no body likes me attitude--why? Well I'm a weird freak--(says you, maybe you're just hanging with wrong minded people) so what makes you weird? Unique is good, accept that about yourself. If you are truly weird, can you change that? do you want to? So you decide on this stuff. Now you gave the negative thought it's two minutes of glory. When it hits again, remember your solution, sometimes it's 'I'm not changing I accept myself as I am', and that's when you bring in the positive thought. I am unique, that's good enough for me, that's my decision I accept myself as I am and smile. . Your negative thoughts need addressing, they need to be faced and a decision made on them, then they get relegated to the back burner or right out the door. And you set a trigger to bring in a positive thought. your trigger is simply this is making me feel like crap for no good reason, you stop, think of your decision, or make one, and hit yourself with a positive thought.. Meditating helps a great deal with this. It doesn't happen quickly, give yourself a break and the time to accomplish it.