<human>: Weight has always been a struggle for me, but not in the same sense as I see in general. I've always been generally active, but it has depended on my 'cycle' mostly.

When I say 'cycle', I'm not referring to my period. I'm bipolar(which is something I'm a little bit afraid to say out loud on reddit, considering the general hatred the hivemind has for the 'crazies'). I'm medicated and under control for the most part, and can lead a fairly normal life where most people will never even assume I am bipolar. I wasn't an extreme case to begin with, so I guess I should consider myself lucky that it's not worse.

My struggle with my weight and general health is related to this. I've always been either small or big, and it depends on what I am going through at the moment. My cycles last a few weeks to a few months, so I will be manic or depressed for a significant amount of time. Sometimes this is triggered and sometimes it isn't. I've never been one size consistently. 

When I am manic, I will be very active, very health conscious, and lose weight very quickly. When I am depressed, I will have a terrible diet and gain weight very quickly. This is a huge problem and very unhealthy to boot. 

Right now, it is especially bad because my family has a lot of hereditary health problems. This includes Diabetes, hypertension, and mental disorders. With diet and exercise I can avoid the first 2, but I need to stay consistent to keep it that way. 

I want to lose weight and keep it off. I've been as big as 196 and as small as 139. My goal is 155 at this point, as anything smaller makes me look like I have an eating disorder. I'm not so much concerned about my weight as my health, the weight loss will come with that.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I can't stay consistent. I'm either big or small. I want to be one weight and have struggled with that my entire life. Has anyone else had this problem? Any advice? Tips?