If I 21m keep having thoughts of ending my relationship with my 19f gf, should I?

Let me start by saying, this is only my second relationship so I have very little experience and I don’t think I’ve ever actually been in love. We’ve been together for like 7ish months (I know it’s not a lot) but recently everything’s just gotten to much and I feel like I haven’t been showing her what she deserves. I feel like I’ve subconsciously checked out, don’t get me wrong she is super great. She always treats me super well but she overthinks a lot and it’s getting exhausting. She’s been on me a lot about not showing her love how she wants it, but I feel like I can’t give it to her how she wants it because I feel like maybe I’m not in love? If I keep thinking about ending things I think that means I should no? I’ve never been in this situation so I wouldn’t even know how to do that and she’s a great girl so I don’t want to hurt her but if I stay in this and don’t give her what she deserves I am hurting her anyways. Like I said I’m super new to anything relationship wise so I do need lots of advice. Thanks in advance!