First, you need to understand that just because someone is your boyfriend, that does not mean you should have access to every detail of his life. He has the right to privacy, and being his girlfriend is not an open pass to pry into all of his business. Just because you want to know something, does not mean that you have the right to, or that you even need to. Sometimes things are painful, personal, or embarrassing. Nobody should be forced into divulging those sort of things if they don't involve you.
If it does not directly involve you, then let it go. If he wants to tell you, he will. If he doesn't, it may just not be your business. Giving him his space is a type of respect, and it shows you care about him as a individual person, not just as an attachment to you.
If it does directly involve you, wait until you are alone. Straight up ask him. If he won't tell you, ask him why he doesn't want to discuss it. Playing head games or trying to be manipulative will just make him clam up even more. He is likely smart enough to see that is what is happening.
Decide how badly you need to know. Think on how much you trust him. Could this be a deal breaker? If so, explain to him that not being open with you about things that directly involve your relationship is causing a trust issue, and that is a problem for you. Just keep in mind that forcing information can damage his trust in you, and if he is up to no good, then he is likely to lie when backed into a corner anyway.
If he still won't tell you, then it is up to you if you can continue on in the relationship without this information or not. If it is that important and being withheld, it might just be time to move on.
Another way to try it, is for you to open up on that same topic first. That will give him the confidence to talk about it.
Find something you have in commen. it's alot easier to talk about something you both like
hes a homo
Be yourself! talk about what you would talk about with your friends! ya i know easier said then done! but still try it and if that doesnt work just try to get to know him better.
You need to talk. How do you know he is your boyfriend if you aren't talking? I hope you are having one to one conversations since the phone or texting isn't working. You need to find out what he is interested in to get him talking.
Dont forget him. You need to talk to him, tell him how you feel about how he is treating you. :)
Ignors you and doesnt talk to you.
if something doesnt feel right in your realtionship. maybe you should talk about it first with him/her. you never no who you could be losing. but if after you talk abeout it and it still doesnt feel right it could just be your imagination running, or it could be that you are right that, something may be wrong.
find some thin common that you both like then talk from there!!
doesnt matter if there in it or not. just talk. hes you EX boyfriend. who cared what he thinks.
if he doesnt talk about it much, doesnt bring it up during conversation.
Maybe he's embarrassed to talk to you or wouldn't know what to say. he doesnt want it to be dead scilence, it makes him feel awkward. but, it means he really likes you and doesnt want to say something stupid and ruin it.