Breaking up w my girlfriend

So I met this girl that I fell so hard for and somehow managed to be in a relationship w her. She is my first ever love and I couldn't have asked for a better partner, but this past upcoming week I have just not been feeling the spark for the relationship I once had. In the beginning of the relationship the progression was so slow, I didn't even get my first makeout until like a 3 weeks in and yet I was still happy. However this past month, although things have been progressing. I just don't feel like dating anymore, I still love her but something in my stomach just doesn't feel right.

We have been dating for 2 and a half months, and now I just don't feel the spark of the relationship anymore. I can't go on anymore, I don't want to hurt her. I don't want to communicate this to her because she is very emotional.

I don't feel happy anymore it feels like I am trapped, it's not like I have a problem with the relationship it's super healthy. However, I never felt this way I just want to be single. My friends would get so mad at me for breaking up w her, I just can't stay in this relo anymore. I feel like something is missing, I have been getting more dey even though I try to fight the urge to bring back the spark. I love her don't get me wrong, I just can't take it anymore.

I never talked to girl before, so I am surprised that I feel like I want to break it off. The more I continue in the relationship the less happy I become, I don't know the reason why.

So my question to you guys is, how do I break this relationship off without hurting her feelings. Also, should I add a specific reason as to why, or be straight up and say I just don't feel the spark in the relationship anymore. I just can't continue it no matter how hard I want to fight it.