Translation of nachvollziehen

Thanks for the message. I hope that your friend here in England will soon be feeling better. If you decide to come at another time, I would be very pleased to meet you here. You can sleep at my place.
True, I forgot the 'I' when I have copied and pasted the entire text field. I assume it is the regular form, isn't it? However, the formal form in Spain is a little different to what we are using in Mexico.
I am also your friend now, how nice is that. I am learning English for a year. I love this language. I already can speak Spanish, because my mother is from Mexico. Your German is really well!