medsurge

Hello everyone, I am a young and new EMT (less than 2 mnths) and I work in an urban area for an EMS company at a fire dept. My partner understands that I am new, but sometimes I think he forgets. It seems that every time I am trying to start an iv on a patient around him, I can never get it. When he had to miss work a few times, every line attempted when i was with his substitute I got. they all said that I did a good job, and one of the medics actually said she wanted me as her partner. I know its gonna take time for me to get used to the truck and environment, and trust me I am a lot better than I was day one. What is your advice for me as a new emt? Thanks.