Anal help 😵

Hiya ladies, me and my boyfriend have been wanting to do anal for a while now. 
Last week we attempted with strawberry lube (which smelt so good😍) but he got in like 1cm and I screamed and he had to pull out and I  cried for 10 mins. 
He has a thick big dick, which I'm not compiling about. 
He's been away for a week and tomorrow he's staying over mine and I reaaaaaaally want too!! 
Any tips and advice please? Did anyone get this problem? 
🙈🍆🍑