Thank everyone for the answers -
I've asked him once and he totally got upset and said he wouldn't give it to me cuz I didn't trust him (WTF?) - and then a day later he says here you go check (which is stupid cuz he could have deleted the messages). I think I know the answer - just wanted to be sure 
this sucks . . . . he's cheating
Related posts:
can you hack a cell phone?I am not a jealous person, but my wife has been acting very odd for the past few months...
AT&T security deposits?When I turned 18 I applied to get a cell phone through AT&T, and they told me I had to...
Does anyone know of a cell phone spyware that works?My friend ( and yes it is my friend, i'm single) thinks her husband is cheating. She...
Is it possible for someone to hack into your cell phone? How?someone hacking into your cell phone and turning your camera on - viewing you text...
How can I detect cell phone spyware?How can I detect if someone has implanted spyware on my cell phone? About 1-2 months...
SGH-T629: Cell phone monitor broken; how do i fix it?I have a cell phone that works fine but the screen got cracked and I cannot see about 80%...
How to backup cell phone content?How would i back up my cell phones picks and ringtones onto my pc? i plugged the phone...
is there software that enables monitoring cell phone calls texts location?ghost phone? cell phone scanner to monitor phone calls? if so can you counter these...
Any tech-savvy people know how to hack into someone's texts/pictures?My friend Jason hacked my phone and got some of my pictures after I refused to send them...
how can you find out your cell phone has spyware?How can I find out if my cell phone has spyware on it, if someone is reading my text...
1 jocemalyn //
Why don't you just ask him what's going on? This seems much easier…
2 Neo //
most probably he is seeing someone else
3 cajunspike1959 //
No such thing…besides the fact that would be illegal.
4 nator419 //
sorry but i doubt there is anything easily used but if the signs are there then you know what needs to be done. of course you could just make him give you his phone but i think you already know what your going to find
5 bones //
No sorry. But there is no good reason to hide a cell phone!
6 fTb2 KiD914 //
umm…..yes i do know how… Shhhhhh.ok listen go to trackmycell.org
7 inTOdeep //
you can go to jail for that and eh your boyfriend is creeping around….orrr he's planning somehting big for you and its in his phone? just ask or take it from him
8 B8JgzuF //
When i have a question abt a anti-spyware software i always visit:
http://www.altavista.com/web/results?itag=ody&q=TopTen+Review&kgs=1&kls=0
can search what I want.
have a nice NO spyware day!
9 joe08 //
This is a really hard question to answer,
So I will recommend ,You have to check it out yourself.
Follow the link below and you'll come to a site that has all the info you need about "spyware / internet security".
Hope this helps out some way
http://syubrawi.com/spyware-blockers
http://fantastic-galleries.net/spyware
http://computer-internet-security-software.blogspot.com