Bipolar Depression

MY GF, 31, gets depressed, she's on lexapro, but still gets these depressed crying fits, seemingly out of nowhere, she says theres nothing wrong, or she's just homesick, (she moved 30 mins away to be close to me, from a place she's lived her entire life)

Now some of this I understand, as I've battled depression in the past, and to some degree still have to fight with it.

Heres the difference and the frustration, she has resigned herself to the, "I'm just sick, this is the way I am and always will be, I will always be on drugs, and all I can to is take them, this is my lot in life, I get this way and it just happens, nothing I can do" way of thinking.

Now this is frustrating for me, I got to a point with my depression (I had tried to kill myself many many years ago) where I had just had enough, just had enough of feeling bound and gaged to these feelings, that in many cases were brought on by NO outside source.

I began a realization that I have triggers to happiness as much as I have triggers to sadness and depression, that, there may BE chemical thing in my head that makes me sad or depressed, why can't there be the same for feeling content or happy.

and ultimately I DID NOT WANT to be on anti depressants fort he rest of my life.

I realized that I needed to workout VIGOROUSLY at least 4 times a week, that I needed to DO SOMETHING as soon as I feel the slightest uncomfortable feeling rise whether that be clean my house, go for a run, blast my favorite music, call friends, to push ups, play my guitar, I memorize Shakespeare monologues, all to take my head away from where it is and focus it on something else.

I find that works for me, don't get me wrong I still feel bad every now and again, but I'm not on meds anymore and I haven't had any serious bouts since I began this forced realization.

I get frustrated with my gf, because when she gets this way I want to help, and she won't TRY anything, I'm taking my pills, thats all I can do, etc. she says I shouldn't take it personally, but she has these crying fits, and I feel bad.

We're engaged, and I feel like, don't I make you happy? is this about me? and she says no, and gets frustrated because sometimes I take it personally.

but she doesn't do anything aside from take her meds,...she does get in these kicks for a week or so when she's feeling great and she's going to the gym regularly, but then she lags from that and gets back into depression.

She says it also gets worse around the time of her period, and I guess I can understand that.

is there anything I can do?

she says I need to stop trying to fix everything.