I think I'm falling for somebody whilst I'm in a relationship
What is it that makes you feel like you're falling for somebody?
There are several reasons. One is the way they smile and another is the way they blush when they are next to me.
Lots of people can still attract you while in a relationship already. Make yourself forget this new person before it ruins your entire relationship you have now.
If I try and forget her and how much she means to me, I'm going to lose control.
If you feel this deeply about someone then you should break up your current relationship. It's not fair them if you are this in love with someone else.