Please help! We're friends, have been for about a year. We have this kind of 'flirtationship' but it's also kind of sassy. He teases me about everything and I tease him back. He messes around with everybody and kind of flirts too. But there have been a couple times when I think he's kind of serious with me. Like I look up and see him watching me, just standing there looking at me while he drinks something. If he's not serious I don't want to i. e. embarrass myself or ruin the friendship either. Should I go for it? What should I say?