I'm not really able to deal with my boyfriends venting
Does he vent to you excessively?
I guess, I mean I dislike it when he vents at me for the 50th time
I can see how that might aggravate you. He is your boyfriend though and it would be good for you to try to help him with his problems. Maybe try listening to him when he first vents so he doesn't have to do it so many times.
Alright
I'm glad you see things my way. If he continues to vent after listening to him then politely ask him how you can help.