Hey there. While I'm not familiar with that medication (so no clue if the blood thing is a side effect, though I've certainly never heard of anything like that, so I'd have that checked out if I were you) I can tell you that taking any medication for that long will lead to a physical dependance (anti-depressants, blood pressure meds, ect) so stopping it will probably cause some minor symptoms for a couple days but shouldn't be too bad, if you're wanting off them completley.
As far as addiction, it doesn't sound like you are addicted, though only you can know for sure. Addiction is more a phycological need for the medication, and an inability to stop at theraputic doses. Like if you said, "Well one works fine, but 3 would make me feel even better," or just flat not being able to resist taking more even when you know you don't need it. If that's the case, then you are luch better off stopping them now and dealing with minor withdrawals than starting the spiral to full flegged addiction. Hope I've been a little helpful! Take care!
I was being serious you know.