You know, this is such a common problem and I bet you feel like the only guy on the earth who has ever had this. This can happen for a number of reasons, most of which are psychological, but sometimes it is physical too. You can be very nervous, physically without realizing, the more comfortable you are around her, the easier it will be for you to get an erection.
Another thing is to be careful that you are eating the right kinds of food and staying well hydrated. Poor diet and poor fitness levels often lead to poor sexual performance.
Also, go without playing with yourself from now on, your body will respond to her touch much more readily. Sometimes the body needs to get used to someone else touch.
If this continues to be a problem, go to the doctor, there's no need for you to stress when the little blue pill can sort it out.
Another thing is to be careful that you are eating the right kinds of food and staying well hydrated. Poor diet and poor fitness levels often lead to poor sexual performance.
Also, go without playing with yourself from now on, your body will respond to her touch much more readily. Sometimes the body needs to get used to someone else touch.
If this continues to be a problem, go to the doctor, there's no need for you to stress when the little blue pill can sort it out.