How can I get looser?

My boyfriend and I have been in a long distance relationship for almost a year. We're currently living and working together until the beginning of August. We've tried to have sex a couple times, but I'm a virgin so I'm extremely tight. He's tried fingering me a lot, but he hasn't been able to use two fingers yet. His penis is 3 fingers thick. He said that it isn't normal/common for it to take this long. My other friends told me that it took them a few tries as well before their bf was able to enter, but I think it's taking too long with me. Maybe it's because I don't finger myself. Idk. Any advice?
He said that maybe starting using tampons instead of pads will help. 
Also, I really don't want to finger myself. So if there are any other suggestions you ladies have, I'd love to hear!! Please help.