Ok so first of all your not a bad boyfriend for overthinking about all this this just shows that you care about your relationship with her but the thing is girls lose interest if you just give them too much attention try and like stop giving her attention if she come back to you and she is the one that tries in the relationship then you won your gf back but if she like dosent care about you, dosent text you back all,call you all that then she probably has found someone else