Well, it seems to me you don't have a real strong chemistry built between you too.
Being boyfriend and girlfriend, you guys should have something to talk about. Maybe you guys are spending too much time on the phone.
DO you guys see each other alot? If you guys hang out, and than when ya'll leave one another and talk on the phone, it limits conversation. Try taking a couple of days to not speak to each other, to build up conversation.
But, if you don't want to do that than try getting to know him better. Talk about something he really enjoys doing, or watching.
Like for instance, my boyfriend loves basketball. I absolutely hate it; but I asked him questions about it, just to make him speak and talk to me. He enjoyed talking about basketball, it never got old to him.
So try that.
OR..
You can be completely random. Ask him questions to find out more about him;
like..
What is something that really attracts you to the opposite sex?
What's your favorite color?
Hobby?
something you like about me?
something no one else knows about him.
just silly little questions to make conversation easy and fun;
I hate to say this, if conversation doesn't perk up, than it means that he is either bored with the relationship, and it won't last long.
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