<human>: So, we've been dating for about a year and all our relationship i cared about he a ton and constantly tried for her attention. Though, After about 9 months we broke up, it was mostly because she liked another guy.  After she begged to let her back i did, and then a few weeks ago she told me she might have feelings for the guy. Then next morning i went to go and break up with her but she ended up talking me out of it. Ever since then i haven't felt the same, I've started to care less. Also I've been lying to  her about drinking and smoking and she is very religious and would defiantly leave me if she knew. I don't think its fair to be with her, but she has been my best friend for the past year and i did everything with her

Please help, or just some advice. I know you don't think its serious because i'm only 16, but i really just think i need some unbiased advice

Can you summarize the given text in a few sentences?
<bot>: dating for a year I've been lying to her and i don't think its fair, she may also like someone else.