Maybe not bad, but certainly not advised. Even though that's only 2 years, at your age that is a lot. He should be going through different phase in growing from you ass well as having different experiences. I won't lie, I wouldn't allow my 13 yr. old daughter to date a 15 yr. old. This falls in the category of life's lessons and I can assure you in 10-15 years you will most likely tell a 13 yr old just what I'm telling you. : )
No, it's completely casual, if you ask me. My sister is 18, and she's dating a twenty-year-old. That's a two year difference and you're dating a 15-year-old; also a two year difference. So, I don't think it's really what you call "bad."
a little, but only cuz you two go to two different schools and its elementary with high school, but when you get to high school and he is in high school two then its ok ok in fact its the norm for girls in high school to date above there grad i hope that helps ;)