Boyfriend Comes Home After 10 Months and I’m Sure BOOMBOOM But I’m Nervous But Still Excited

So my boyfriend is coming home late late late tonight; well, in the next 2 hours. I’m super super excited but I’m also very very nervous. See we haven’t seen one another for 10 months and I’m sure he’s going to want some boomboom if you know what I mean, which don’t get me wrong I do too. But you see he’s a bit big!!!! Now I love how big it is but when we first started doing it when we got together; it took me about a month to adjust and it was somewhat painful but once I adjusted I love it that size. But.....NOW.... it’s been 10 months and I’m so nervous...... I hope it doesn’t hurt!!!!

Any advice any of you girls can give me you help me out to not be in as much pain?