Firstly, break ups happen for a reason, so if you love the other person then take your time to calm downm get your senses together and work out what you can do on your part to make it work. Let the other half know you know the reasons for the break up and want to fix things. Sometimes emotions can becaome overwhelming resulting in the break up, in this case, you shouldnt be apart otherwise youl regeret not trying in the future.
Dont ever act desperate, been calm and try sorting it out, let the other person know you love him/her without sounding needy.Everyone goes thropugh reak ups but when your back it gets stronger than before. Try your best but if you feel rejected, then know that you did your bit