Aries is a person who has a somewhat special personality, is very ardent and in turn can become a rather stubborn person. He will always like to take the initiative, he is not one of those people who are waiting, basically because he does not waste time, this can make it a great challenge for Aries to commit. There is a secret to be able to achieve it and it is to play calmly and respect all your freedom, the moment you notice that you are drowning it will disappear. You have to give him as much time as he needs and that is when he will realize that you are strong enough to stay in his life.
On the other hand, it is very important that you are very transparent with him/her, that you tell him at all times how you feel, if you want to commit to him/her I do not know what you do by keeping all your shits. Aries wants you to be with him/her for the good and for the bad just as he/she will be with you. Although Aries is a very independent person, there are times when he needs to be treated, to notice that feeling that there are people who care about him/her.
Love the challenges, so if you want your heart to be in your hands, take note once and stop fooling around. You must act as if you cannot care less about him/her. Surely it sounds somewhat twisted to you, but that game that you will end up with Aries will make you wake up something inside. As I said before, Aries loves challenges and will not be able to resist once he thinks he cannot have you, that is when he will fight to hold you in his arms. Aries has a very strong personality, so if he commits it is because he really cares about you and because he has very clear needs, and one of them is you.
Aries is a person who likes to have his space for everything so, the most important thing of all to get him to commit is not to press him.
Once he/she knows that you are not trying to control it, he will fall asleep at your feet, because he will see in you a person who only cares about him/her without any crappy interest.