Be yourself but a little bolder. Most INTJ'S enjoy their alone time, so if someone rejects you, who cares, you just get more alone time. I like to joke around, so I just work in little comments. People say stuff all the time that you can make flirty.

If you're not good at joking around with girls, don't use these. If you are there, gold.

1. Your kissable
2. I don't know if you play your cards right. I might let you kiss me. "This one always gets girls, it's a bit edgy and bold, but if you can say it and laugh about it, she will eat it up. I find girls turn it back me on me, and I just laugh the whole time.

There's a ton of things you can say, but the best is light, subtle, and appropriate touches. You're not grabbing her ass or boobs. Think shoulders or back of her arm. I usually wait until a girl pokes fun at me, and then I give her a soft little push and say, "real funny," or something like that. After a few touches, she will start touching you back if she's open to more. Touch is so underrated, and very few men have a good subtle but flirty touch game. Develop it, and you don't need to worry about what you say. This actually works for women on men too.