Absolutely anything that interests you.
find some thin common that you both like then talk from there!!
Talk about what you guys can work on so you can work it out. You both should engage in the conversation. It takes two to have a relationship. Good luck.
You can talk about how they are feeling, or anything that they're into.
You should be able to talk about everything. A boyfriend should be your best friend as well as your boyfriend. So you should be able to talk about planes, cars, girls, boys, family, friends, and everything inbewteen.
talk to him about what he want you to do
the best thing to talk to your your boyfriend about is everything and anything you should be able to talk to your boyfriend about anything and everything and both of you should be able to feel comfortable about any conversations he should talk to you about anything and everything even if its just nothing on your mind you should be able to speak your mind with him.
If you still want to be with him, offer to talk over whatever it is he thinks you need to talk about. If he agrees, the be willing to listen to what he has to say.
About what you guys did that day. Ask him how he's doing. Something you guys would want to do together.
Well, you should break up with your new boyfrien because its not fair to him and talk things over to him that you still have feelings for your old boyfriend, if he really likes/loves you, he should respect how you feel and leave you alone. Then, try to talk things out with your boyfriend because you don't want anyone stealing him right? so you guys talk and tell him that you still like/love him and stuff. If you really like/love him so much, you wouldn't give up any getting him back ;)
You should consider it a break up and start dating other boys, or possibly take some time for yourself to do things you want to do without having a boyfriend or dating at all. You shouldn't snub him or quit talking to him, but you shouldn't go out of your way to see or talk to him. At work, you should talk to him when you need to for work purposes.
talk to that friend.
If he actually loves you he'll try to talk things through not just break up with you.