I I'm Really Sad And Lonely At This Point

My boy freind and I don't live together and at present he is distressing me. I'm not working atm and live alone. I get agoraphobia and suffer from anxiety and depression. I'm feeling really isolated. My boy freind has been staying with me a couple of days a week and I haven't heard from him since he left two days ago. I'm madly in love with him and am struggling with dealing with how lonely and incomplete I feel without him around.
We've talked at length about keeping in touch with each other and communication within our relationship but as soon as he leaves it's like he stops contacting me and doesn't seem bothered by it.
I'm sick today and am feeling very alone. Having to look after myself have had no sleep.