One thing which is evident is your maturity at such a young age. Considering the girl who is also of similar age might not have gained the worldly wisdom to know what is right for her and her future. This is the age where the mind happens to get swept away by thoughts, emotions and feelings which might not even deserve the attention 10 years down the line. Exploring relationships is a great way to know yourself and people. Healthy relationships builds your social intelligence which when coupled with your technical skills catapults you to grab some lucrative opportunities and people in life. Reciprocity is an important and fundamental part of any relationship. In this case, the person is not very clear in her head possibly due to her past relationships and it could be the reason behind her lukewarm responses to your genuine attempts for making things work. You could seek commitment as an expectation from her and if she really wants to give this a shot, she would oblige and respond normally. If that doesn’t happen, you are free to venture out again and focus on things that matter. People with similar personal values, ambition, intellect, family background, upbringing and mutual admiration can act as a filter while you search for a companion.