advice!

Me and my boyfriend been together for a year now! Everything been fine! Last year he whent to world championship in ice-hokey, there he met some women just friends but not close, this year he whent again (10day) and the woman also was going with her boyfriend but before the holiday there relationship ended.so my boyfriend and his friends took care of her there so she doesn't be alone!know they have become very close friends in such a short time! She is texting him"how are you hows work life maby something else but I don't know! I think she is interested but not sure! He said there friends and nothing more! She also knows were are together but still texting kiss to him! I have talked to him and he understands but he said there friends that it! Even since he is back he is texting different"he noticed also ", but he said he needs time to adjust from all the drinking to come back to realityand then everything should be fine .il say also she lives in Norway and we live in Ireland!and an other thing is I don't trust noone 100% because of my past relationship were I have been cheated on. I just don't know if she respect that were together or she is interested in him,he said he's not that she is pretty but there friends! I don't know what exactly there texting each other!il also say that we have a big age difference iam 21 and he is 34 but it hasn't been a problem we understand each other and everything is fine except this situation now. I never met the woman my self so maby that's an other reason for my feelings! I don't want to be the jealous girlfriend and tear our relationship apart because of it if there is no reason!