Got dumped for being to clingy and saying I love you too early.

Saying I love you turned out bad
Me and my 17 year old gf have been dating for one month. I told her I loved her yesterday. She responded with "I dont know what to think about that I have been thinking about us for a few days just give me another day to think about us." The past few days have been really fun with her though everything seemed normal. I did feel like something was off I just didn't say anything. I told her I'm not upset she doesn't love me but upset about her thinking the past few days before I even said I love you. I told her I respect her choice and she can think however long she wants too. Well to no surprise I get dumped for the clinginess she said and I'm pretty sure with saying I love you early even though she didn't directly say it. Also, she brought up how we jumped right in the relationship and didn't even hangout a lot before we got serious. Which is true I made that mistake and rushed it. But she admitted that before we got very sexual like blow jobs and all that stuff I wasn't clingy, which I agree. Later that night I saw her at coffee shop with some friends and she came over with them and sat down and talked for awhile just real casually and I just played it like nothing was wrong with me and everything was cool. She told me she is glad were friends. I'm trying to show her I can be not clingy like the person she knew at the beginning through a friendship. Help please? I really like this girl and think something is there.