What should I do?

Im currently in high school and Ive known this girl for a while. I met her a while ago but we didnt really start talking until two years ago. I was lucky enough to sit next to her in science. When we talked it was mainly about school stuff but every once in a while about something else. We didnt really talk much outside of class and because of that I was never sure if she liked me. She is what you might consider "popular" and because of that she was usually talking with her other friends and since im sort of more on the shy side I didnt really talk to her either. Anyways, after that year we really didnt talk anymore since I didnt really have a chance to and I didnt know what to say to her. So, its been two years and I find myself still thinking about her a lot. What should I do to get back in touch with her and in a way so that it isnt awkward or anything.

You may have missed your chance, my friend.

It is common for males to romanticize a girl who they had positive interactions with in high school, but this is not the basis of a relationship. Your expectations are probably unrealistic.

Have you dated other girls?

No not recently

I think you should work on dating girls from the present tense, and let go of the past. (If you happen to run into the girl again, that's another story.)

But the thing is there arent any girls that I really like or am all that interested in. Also on top of that I have trouble starting conversations with them. Any tips?

It seems that 90% of males are hitting on the same 5% of females. That obviously is dumb. Branch out a little. Most (nice) girls will help you with conversation because they want you to feel comfortable. You can start out by asking about her friends, family, hobbies, school, pop culture, etc.

I have realized that most guys will be going for the girls. For me I actually try not to go for the same girls. I dont really like competing over a girl. One thing though is that I just dont feel really attracted to all that many of them and some that I am seem to be interested in another guy so I dont even bother. Also about starting a conversation, how do you think I should go about it? If I just went up to them and started asking about them or whatever wouldnt that be weird?