I have had asthma since I was a kid that became severe asthma as an adult (sometimes it progresses that way, unfortunately.) Losing weight helped some (I weighed about 195 in 2007), but not a lot for me. What does help me incredibly is daily medication taken very faithfully. I take Pulmicort (a non-steroid daily inhaler. Non-steroid because I've been either pregnant or nursing since Feb 2008 - the steroid ones are way better

) and Singulair, for my allergy induced asthma. I have a rescue inhaler that I'll use sometimes before I exercise , but otherwise I don't use it much.
Before I went on my daily medications in Dec of 2009 I was in the ER every 2-3 months with an asthma attack. When I went into the hospital in Dec 2009 I was admitted for 3 days, put on massive doses of steroids and told by 2 doctors that it was the kind of asthma attack that they can't always bring people back from.

That set me straight on my "I don't need to take my daily meds" attitude, for sure! Since I've started taking my daily meds I have not had a single asthma attack. After 10 years of severe attacks I've not had a single one in more than a year. So, all that to say... it is absolutely a manageable condition, even if it's severe. I can still run and play volleyball and whatnot. It's good to figure out your triggers (my big ones are cats, dust, and pollen, and exercise to a lesser degree) so that you can avoid them or manage them as necessary.
Good luck! I hope you get it managed well.
